Brown ground beef with onion and pepper, drain. Boil macaroni from boxes of Kraft Mac-n-Cheese, strain.
Add cheese packets from boxed macaroni to 1 cup water in medium bowl and mix with whisk. Add tomato soup, tomato sauce, oregano, garlic salt, and parmesan cheese to cheese/water mixture. Mix all this together until well blended.
Stir this mixture together with ground beef mixture and macaroni in large casserole dish. Add slices of Velveeta, cover.