Vegetarian main dishes often require hours of chopping veggies, and a laundry list of ingredients – but not in this dish. This easy casserole turns a can of vegetarian lentil soup into a hearty casserole with the help of nutritious, ready-to-serve whole-grain brown rice, canned vegetables, and cheddar cheese. Because the ingredients go into the casserole already cooked (canned vegetables are simply cooked vegetables in a can), all they need is a few minutes in a microwave oven before they are delightfully done and ready to serve.