In a skillet on medium heat, add olive oil, then add bell pepper and onion. Cook for about 2-3 minutes until they are tender. Move it to one side of the skillet. Add lean ground beef, mushrooms, and garlic. Cover and cook until the beef is brown. Combine the beef with the vegetables, then add seasonings.
Then add elbow macaroni, beef broth, and heavy cream. Mix, then reduce the heat to medium low, cover, and let it simmer for 15 to 20 minutes, or until the macaroni are done.
Mix in cheddar and mozzarella cheese until it is melted. Top with slices of provolone cheese, cover and remove from the heat. Once the provolone cheese is melted, serve and enjoy this one pan dish!
Notes
Optional: Add a Tbsp. of Worcestershire sauce to the ground beef.