Preheat oven to 350°. In a large skillet, cook beef over medium heat until no longer pink, 8-10 minutes, breaking into crumbles; drain. In the same skillet, melt butter over medium heat. Add onion and pepper; cook and stir until tender, 5-7 minutes. Stir in beef, Worcestershire sauce, noodles and soups. , Transfer to a greased 3-qt. baking dish; top with cheese. Bake, uncovered, until heated through, 45-50 minutes.