Rich and gooey, this deep-dish pizza-flavor casserole puffs up as it bakes. It's as much fun to make as it is to eata surefire bet for kids.
1. Preheat oven to 400 degrees F. In an extra-large skillet, cook ground beef over medium heat until brown; drain off fat. Stir onion, sweet pepper, garlic, dry spaghetti sauce mix, and oregano into meat. Add tomato sauce and the water. Cook and stir until boiling; reduce heat. Cover and simmer for 10 minutes.
2. Meanwhile, in a medium mixing bowl, beat milk, eggs, and oil with an electric mixer on medium speed for 1 minute. Add flour and salt; beat for 2 minutes more.
3. Transfer hot beef mixture to an ungreased 3-quart rectangular baking dish. Sprinkle with mozzarella cheese. Pour egg mixture evenly over top. Sprinkle with Parmesan cheese; top with pepperoni slices (if desired).
4. Bake, uncovered, for 25 to 30 minutes or until puffed and golden. Serve immediately.