Use microwave rectangular dish. Layer ingredients as usual ALL UNCOOKED.

4 or 5 c. spaghetti sauce or part tomato juice
8 oz. lasagna
1 lb. Ricotta cheese
1 lb. ground beef or 1/2 lb. beef and sliced and peeled eggplant
1/2 c. chopped onions (optional)

Top and layer with your favorite cheese (use low salt and low cholesterol cheeses).