Now, this is the important bit. Pre-heat your oven to between 80-90C with the fan blowing. You don't want to cook the curry, but just dry it out. Put the curry in the oven but leave the oven door slightly open.
It will probably take about 6 hours to dehydrate. Every hour or so, take it out of the oven and stir the curry around. Enjoy the aroma as it is dehydrating
When it's completely dried, take it out and weight it again..
Make a note of the weight. The difference between the weights is amount of water in ml that you have extracted, and have to add back in to get the original consistency. In this case it is 1252 ml or 1.252 litres of water.
Get some Pour & Store bags..
Split it into 2 portions and bag it up.
When you come to prepare your meal, boil extra water when you make your first cup of tea and add this to the bags and re-seal. This will start the rehydration process while you are having a cuppa and your first courses. Add the contents to a pan and add water until you get the required consistency, and make everyone else jealous of the smells drifting from your tent.
There you have it. Curry for 2 to warm you up on the OMM.
Enjoy.