When you want to lose weight, you have to burn more calories than you consume. That's why eating low-calorie foods is so important. These casseroles are great because they combine a moderate amount of calories with loads of nutrition and a filling meal that is great for dinner and then warmed up for lunch the next day. Be sure you balance the calorie content of these casseroles with what you eat for the rest of the day, and be sure to stick with a moderate portion size. Enjoy!