Most RV's have a stove and a microwave. The only reason they are installed at the factory is to be used by the owner. Many meals can be ready to eat in about 15 to 30 minutes, from scratch.
GET A COOKBOOK! Start cooking yourself, if your wife isn't "into" cooking.
Try this on: Brown two chicken breasts in a frying pan in butter, when browned and a little water and simmer till cooked thru. Sweet potato in the microwave. Chop some lettuce and veggies for a salad. Eat. If that's too much work, I guess your going back to Mickey D's.