Wanna be self sufficient with minimal equipment? Learn about sprouting. You can sprout grains, lentils, peas and beans. And even some nuts and seeds. Sprouting significantly increases nutrients and doesn't require any cooking. Its always available as soon as its sprouted. The ultimate high nutrient, natural, fast food. For most foods they are ready in just 18 to 36 hours. Some as little as about 12 hours. And remember that what you are sprouting is very unperishable and lasts for years. Canning, sauces, food prep....what a waste of time. Go with the core ingredients. You'll also live a lot longer without the salt needed for canning. Not to mention you're canning in aluminum cans (at least most people do). Marmalade? Packed with sugar. Higher glood sugar levels are linked to almost every disease known to man. It makes everything worse. What's the point of prepping if you're just going to die of a heart attack shortly thereafter? Doesn't make much sense.
One of the main attributes of survival in hostile situations is remaining hidden. Good luck with that if you need a fire to cook. Go raw. Its a million times better.
I notice preppers never consider insects yet they breed like crazy, are high in B12 and other nutrients, are high in protein, low in fat and almost all can be eaten raw so you don't waste energy cooking your food. In a survival situation cooking makes very little sense. It just wastes power. Power you may need for far more important things. As an example I would challenge anyone to try black ants. They are incredibly delicious. (Red ants are bitter - stay away from them.) Just one of so many insect meal examples.