This easy Johnny Marzetti casserole is a traditional Ohio recipe that is a great make-ahead casserole for potlucks because it serves a crowd!
Cook the macaroni in a large pot according to package directions until it is al dente (about 6-8 minutes).
Brown the ground beef and sausage in a skillet over medium heat until it is completely browned and crumbly. Drain off any fat.
Add the onion, bell peppers, garlic, oregano, Worcestershire sauce, sugar, pepper flakes and garlic salt. Cook and stir for an additional 5 minutes to soften the vegetables.
Add the diced tomatoes and tomato sauce. Stir well.
Spray a large casserole dish (9×13 size or slightly larger) with cooking spray. Spread the pasta over the bottom of the prepared pan.
Sprinkle the Italian cheese blend over the pasta.
Spread the meat sauce over the pasta and cheese. Cover the pan with foil and bake for 45 minutes.
Remove the foil, sprinkle the cheddar cheese over the casserole and bake for an additional 5-10 minutes, uncovered, until the cheese is melted.