Simmer Squash And Bell Peppers In Water For 30 Minutes. Add Beans. In Separate Pan, Saute Onion In Butter For 7 Minutes. Add Garlic, Paprika, Salt, Pepper And Oregano. Stir Onion Mixture Into Beans. Add Cheese, Bread Crumbs And Milk. Cook For 5 Minutes. Place Into An Ovenproof Dish. Bake For 15 Minutes At 375 Degrees. Serve.