I am used to putting all sorts of vegetables, like red onions, bell peppers, broccoli, jalapeno peppers, mushrooms, etc. on a baking tin and throwing them in the oven to bake for 20 minutes, to get their edgy, raw taste off. Then I combine them with rice, barbecue sauce, ketchup, and all kinds of spices for a delicious meal! But now, I am homeless and only will have a gas camping stove to use with no oven. How can I bake the vegetables using only a gas stove top? I don't want to use any oils or butters either, as I am trying to lose weight and am paranoid about any fats. And is a 7,500 BTU burner ok, or should I get a 30,000 BTU burner? Thanks!