A vegetarian rice casserole with beans. This easy rice casserole recipe is a great way to use up any leftover rice you might have on hand. Vegetarian rice and beans casserole can also be prepared super quick if you have all the ingredients on hand. Just open up a can of baked beans, add a few spices and bake Recipe courtesy of bush's beans. If you like this recipe, then you'll love 7 exciting ways to make vegetarian rice and beans.