It is possible to bake a casserole in a microwave oven. Quick, simple and convenient casserole recipes that utilize microwave cooking methods are available on the websites for Betty Crocker, Kraft Foods and About.com.
The microwave ravioli casserole by Betty Crocker requires only four ingredients. The cook heats ground beef and chopped onions in the microwave, then mixes in canned ravioli and returns the dish into the microwave for further baking. Finally, the ravioli casserole is sprinkled with cheese.
The enchilada casserole recipe by Kraft Foods uses ground beef, chopped onions, tomato sauce, corn tortillas and cheese. The vegetable chicken casserole recipe at About.com consists of egg noodles, chicken broth, chopped cooked chicken, assorted vegetables and cheese.