In a 4-quart Dutch oven, heat oil over medium-high heat. Add onion, bell pepper, and garlic; cook until vegetables are tender, about 5 minutes. Add ground chuck; cook, stirring frequently, until browned, about 5 minutes. Stir in milk, broth, tomatoes, tomato sauce, Worcestershire, mustard, salt, and pepper, and bring to a boil. Reduce heat to medium-low. Stir in pasta; cook until tender, about 20 minutes. Stir in cheese until melted.
Recipe by Paula Deen Magazine at https://pauladeenmagazine.com/sloppy-joe-mac-cheese-recipe/