My mom does a little micro-waving but no more cooking on the range. I share what I cook with her but she has lost so many teeth she doesn't like to eat things with meat in it and I don't like much that doesn't have meat in it. She's good with yogurt, pudding, cooked and dry cereal, tuna, p-butter (lots of peanut butter!) and a few other things that don't require cooking or just a bit of nuking.
I would do more cooking for her but I want her to remain as active as possible as long as it isn't too stressful for her to accomplish. I hated doing it but I had to make her stop using the stove. She would put bacon on and walk away and forget about it.
My mother put a sweet roll in the microwave and fired it up for about 15 MINUTES, and brought the fire dept out. Twice. She now has only a mini-fridge, and eats in a cafeteria.