Pritikin Recipes

Okay, so my Mom says that I’m fat and if I don’t slim down by next year she is going to send me to Military school and let THEM slim me down. I tried to tell her that if I am fat it’s her fault because she never cooks anything healthy. She says that I should have some self control and not eat what I know isn’t good for me. The problem is she never buys healthy food at all and I don’t have the money to buy it myself. The menu for a normal day is usually Sugary cereal for breakfast, Or scrambled eggs and bacon, Sandwich and chips, or leftovers for lunch, and Hamburger helper, pizza or cheeseburgers for supper. She refuses to buy salad and the only vegetable she will get is corn.
So how can I possibly lose weight when this is what she feeds me?? Also I can’t really go out and walk because my Mom says it is not safe for a girl to be out walking by herself and my brothers will never walk with me. What are some easy exercises and dieting tips I can use to lose weight???

My question again was about diet cooking tips and there have been some great answers