Preheat oven to 350°. Set aside cheese packets from dinner mixes. In a large saucepan, bring 2 quarts water to a boil. Add macaroni; cook until tender, 8-10 minutes., Meanwhile, in a Dutch oven, cook and stir beef and onion over medium heat until beef is no longer pink, 8-10 minutes; drain. Stir in tomatoes, tomatoes and green chiles, tomato sauce and seasonings. Drain macaroni; add to beef mixture. Stir in contents of cheese packets, sour cream and 1 cup cheese., Transfer to a greased 13x9-in. baking dish; top with remaining cheese. Bake, uncovered, until bubbly, 20-25 minutes.