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[Rich.H]

Bugger had me a nice well thought out piece of writing done then a fuse blows and kills everything, so onwards and sod the writing aspect.

Got tired of trying to justify the price of some of the brand bought dried meals you can get as at around £6 for a main meal they are just crazy. Added to this is the fact they are a business and as such I'm skeptical about the nutrition claims they make. I can't see how they are not actually using similar processed food as most supermarket quick meals etc.

So I have recently looked into the various ways of making your own dried meals and the method that gave me the best weight/cost/convenience factor was simple home dehydration. Doesn't work with everything but things like stews, curry, bolognese are just fine and give plenty of variety.

I started with a simple enough portion of a shepherd's pie as I wanted to see how well home made mash works when I know there is a perfect instant solution. The weights for everything are as follows.

Starting weights.
Mince, carrots, & gravy part = 620g
Mash part = 630g

Finish weights.
Mince, carrots, & gravy part =150g
Mash part =140g

These are rounded weights for ease and the finish weight includes the mylar bags. But I still get a total weight saving of 960g. This is handy too as it is just under 500ml of water lost from each part and so quick and simple to know how much to boil for use. I've bought mylar bags mainly as they give a light weight simply eating platform. The theory behind them being you get a good rolling boil of the same amount of water as lost during drying. Water being a nice substance has a density of 1g per 1ml, so you can do a straight conversion for weight lost. Once the water is at a good rolling boil add it to the bag of dried food, fold the bag down and leave to sit for 15-20 minutes. This should rehydrate the food ready to eat, and leave no messing about with pots trying to cook it up.

If I were heading out on a nice gently camp with lots of gear and a big fire I would probably just throw stuff into mess tins and use them as a stewing pot. However I am aiming to use this method with a new GSI cook set that consists of a single 600ml pot, so it will be a case of boil water and add it to food and keep the pot free for use at all times.

So onto a cost comparison. My method cost me around £8 (a very generous guess) for both the food and the electricity to make. This produces me 5 portions of just over 1200g of food for each portion. So £1.60 total cost for each meal. Using current site prices Cotswold sell a Mountain House main meal for £5.50, I think that is about the same as pretty much any retailer.
That is a total dried weight of 100g, compared to my dried weight of 290g. Having seen and handled enough retail dried food in my life I am willing to argue they do not have a near 3x more effective weight reduction method. Thus the main mean for one of these must be far less than 1200g when it is rehydrated for eating. If anyone has one of these types of meal and wishes to get it make up and weight it, I would love to know just how much food there is there. For now I'm going to argue that I am making up a meal that is 1.5 times more than a retail product.

So doing the math we have a retail product:

£5.50 per 100g dried
+ £2.25 for the added 50% I think my meal contains in food weight.
Giving a total of £7.75 for each full sized main meal, compared to my own £1.60 per meal. Thus I am getting almost a ratio of nearly 5:1 on food for cash. In addition I know exactly what goes into the food, I can tailor it for any specific task or any dietary requirement. Most importantly though I know before I even put the packet into my pack that I have a meal I will enjoy eating, I find nothing worse than being out on a hill cold and wet just to discover the packet I have purchased has a taste level on par with a pot noodle, it can be a real morale killer.

I haven't yet tested how well these hydrate but will be doing so today, for now here are some pictures on the basic before and after process.

[Rich.H]

Forgot to add this one with the bags.

[Fred]

Thankyou for sharing this with us.
I agree that the specialist outdoor products are relatively expensive but I just go for the cheap handy option of supermarket dried pasta meals, rice or couscous.
Do you have a special dehydrating machine or can this be done with normal household cooking equipment?
How long do you expect your meals to keep for?

Fred

[Rich.H]

Thankyou for sharing this with us.
I agree that the specialist outdoor products are relatively expensive but I just go for the cheap handy option of supermarket dried pasta meals, rice or couscous.
Do you have a special dehydrating machine or can this be done with normal household cooking equipment?
How long do you expect your meals to keep for?

Fred

I use a bottom supplied home dehydrator, it cost around £40 and you can spend far more than that on other types. Generally you get bottom fed heat, top fed heat, and rear fed heat. From my own research I am of the opinion that that list is also from worst to best in how well they perform.

You can get by with using a cooker at it's lowest temperature with the door left slightly open, or construct your own device that involves fans and incandescent bulbs. But I found all of these options just too fiddly and inefficient for my own use. Retail bought dehydrators have the ability to dry a food item at a temperature range of 10-70 degrees for time periods up to 24 hours happily. This lets you have far better control of things and it becomes more of a setup and leave process.

As to the time food keeps it comes down to the content, generally if your food has a high fat content it will start to spoil quicker as the fat simply does not dehydrate very well, this can be felt with my dried mince as it left a greasy feel on my hands. Generally things that are dairy based or high in other fats are deemed unsuitable for long term storage. But I think long term storage is meant as a month or more, in addition you can do a few things to prolong that time such as vacuum sealing and storing in a freezer. I generally intend to be making food that will be used in around two weeks tops so I don't worry about long term and instead just make what I like the most.

[Fred]

I like the idea of doing a batch of food that would last for a season, which is why I asked about the storage life. I had experimented with a cheap vacuum sealer but it was hopeless. The bags would re-inflate over time, it just couldn't be relied on.

fred

[t18con]

only a suggestion here, but have you considered going into "prepper" type sites to see what way they do it?

[Rich.H]

only a suggestion here, but have you considered going into "prepper" type sites to see what way they do it?

I started out looking there but found better info in places that were more geared towards self sufficient folks. I found many of the prepper/survivalist types were of a mindset that they were able to outlast anyone etc but gave little thought to that actual food itself. The self sufficient type folks were of the opposite in that they were after methods that ensured they got an end product that was both tasty and healthy.

Well gave the first two bags a test run and glad I did as it really didn't go very well. The biggest problem was the mash spuds, and this was my fault as I failed to take into account how badly lumps of dried spud rock will take up water. No wonder the instant stuff is in a powder form . I opened up the second spud bag and put it through a blender and then broke out the mortar & pestle, but I just couldn't get a fine power. This became apparent once I added water, it looked and smelled like perfect mash but on tasting you can feel lots of small grains in the mash. If I were to do this properly it would require buying a blender that was capable of grinding powder or something along the lines of a heavy duty coffee grinder. That is an expense beyond my desires so I think for potatoes the easiest and most cost effective way is just use the instant flakes from a shop.

The mince part however worked quite well, I did discover the bags I have bought are woefully undersized for the task as I could not get a proper roll down seal once water was added. This meant putting the filled bag into a pot with water and heating for around 10 minutes longer than the 20 minutes it had already sat for. I think once I get bigger bags and things have more room to bounce around along with a good seal at the top then the process will be smoother. Oddly the amount of water needed is also a little off, no doubt if I wanted things like carrots to spring to full size then the water weight amount would work perfectly. However I think this would take too long to be practical when camped out, as it stands they are perfectly tasty just on the small side. This meant I did have quite a lot of excess water in the bag which made for a very watery gravy that was more like a stew. I imagine other foods would take up the same amount of water they gave out in good time but it would be a matter of trial and error to get a good accurate list.

[RedLeader]

This is brilliant, thanks for the info.

What exact brand of dehydrator are you using and would going with pasta solve your mash issues?

[Rich.H]

This is brilliant, thanks for the info.

What exact brand of dehydrator are you using and would going with pasta solve your mash issues?

Here is the one I have at the moment http://www.amazon.co.uk/Andrew-James-Dehydrator-Adjustable-Temperature/dp/B009DIFMXK/ref=sr_1_2?ie=UTF8&qid=1403110555&sr=8-2&keywords=dehydrator. However I may well pull some parts out of it to make up a rear heating unit as you tend to get a move even heat spread.

Pasta probably would work better but then I wanted to give this a go as ideally I would like a fairly large range of food types I can take should the desire arise.

[KrazyKat]

 

[Matthew]

Can you post links to the bags and the heat sealer please, a few of us had been toying with a similar idea.

Matthew

[Rich.H]

http://www.fresherpack.co.uk/sections/11/foil_bags___mylar_bags/

[RedLeader]

The heat sealer seems very expensive at £89 or so.

http://www.fresherpack.co.uk/sections/11/foil_bags___mylar_bags/

[Rich.H]

Don't worry about heat sealers, just use an ordinary iron. All you need is a flan surface that expels a large amount of heat. You could probably do it with any old lump of flat steel and a blowtorch if you really wanted.

[RedLeader]

Genius, that's a huge saving. Though getting the iron out might cause some panic in the house, would be quite the break with tradition

Don't worry about heat sealers, just use an ordinary iron. All you need is a flan surface that expels a large amount of heat. You could probably do it with any old lump of flat steel and a blowtorch if you really wanted.

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