My favourite way of saving with cooking Is to cook meals in bulk. You then portion out and freeze the left-overs. This saves in a few ways, You can buy the ingredients in bulk, you save on power or gas when cooking, You save on waste as I find you use all the ingredients and time buy doing a larger batch, you save time, Save on water from doing dishes. I find doing this a life saver for the nights when I come home and dont feel like cooking. You then save money buy not reaching for a takeaway.