We've discussed how to cook more economically and perhaps buying some of the new cooking appliances. We reached the conclusion it would be worthwhile if one already owns one but the likely savings don't justify the purchase price. We will stick with what we have which is a gas cooker, microwave and slow-cooker. We've always batch cooked but I think this will increase, especially with the slow cooker, and we will eat more casseroles, stews etc. While I'm not keen on micro-waving veggies this will happen and I'll have to learn to do it better. When a pan of boiling water is needed then boiling a kettle and emptying this into the saucepan is cheaper. After cooking potatoes, past etc. I started retaining the boiled water in a small pan for cooking, usually steaming, the veg. Myself I feel the biggest savings will come from the slow-cooker, the results are always good and very easy.
I think we have at least two years of these prices ahead of us and possibly they will never return to what we think of as "normal" levels. It's be interesting to learn how many people retain their newfound love of energy efficiency? I've never been so careful, to my shame, hopefully we will keep it up. An awful lot of people changed lifetsyle in lockdown but what I ssee day to day suggests all that has gone by the wayside.
If I do a slow cooker casserole I chuck the lot it eg veg and potatoes. I seal the meat first though.
Next one will be Moroccan lamb....yummy.