Cook the Horizon Organic White Cheddar Cheesy Deluxe as directed.
In a large pan heat the oil over medium heat. Add the London Broil pieces and cook in batches, removing from the pan when just cooked through. Add the bell pepper and onion and saute until tender.
Add the meat back to the pan and stir in the macaroni and cheese. Top with the provolone and broil until the cheese is lightly browned.