In a large skillet cook turkey or beef, onion, and green pepper until meat is brown and vegetables are tender. Drain fat. Cut pepperoni slices in half. Stir pepperoni, pizza sauce, mushrooms, fennel seed, oregano, and basil into meat mixture. Bring to boiling. Reduce heat and simmer, uncovered, for 10 minutes, stirring occasionally.
Meanwhile, for topping, in a small bowl combine eggs, milk, and oil. Beat with an electric mixer on medium speed for 1 minute. Add flour; beat 1 minute more or until smooth.
Grease the sides of a 13x9x2-inch baking dish; spoon meat mixture into dish. Arrange cheese slices over hot meat mixture. Pour topping over cheese, covering completely. Sprinkle with Parmesan cheese.
Bake in a 400 degree F oven for 25 to 30 minutes or until topping is puffed and golden brown. Serve immediately. Makes 8 servings.