Dave,
Two of my favorites are Biscuits & gravy or an egg bake (meat, potatoes, onions, grn pepper and cheese).
What works really good is to break up the biscuits in the gravy and vacuum seal in bags. Same thing with the Egg Bake, prebake it, cut in individual portions and vacuum seal in plastic bags. When ready to eat heat water in a pot ( I use an old 1 gallon coffee pot) and put the plastic bags right in the pot until they get hot. When they are done just cut open the top and eat. Clean up can't be any easier.
One thing I have tried that works even better than the coffee pot is an old pressure cooker. You can preload it with water (doesn't take much), and food bags - then when you are ready to eat just light the fire. Either get a pressure cooker at an estate sale or buy new. I see some of the products imported from India (they pressure cook a lot of their food there) are as small as 2 liters - perfect for a couple of breakfast bags IMO. Pressure cookers will heat your meal way faster that an open pot.