One cup of frozen bell pepper and onion stir-fry mixture can be used in place of the onions and bell pepper. To ensure even cooking, cut up the larger pieces so the vegetables are all the same size.
Kidney beans are a good source of fiber and protein, and they contain iron. Combining the beans with vitamin C-rich bell peppers and tomatoes enhances the body's ability to absorb the iron.
Serve this meatless supper with hearty rolls and cottage cheese topped with fresh fruit.