Heat oven to 450°. Heat butter in large nonstick skillet over medium heat. Add onion and brown sugar; cook and stir 8 to 10 minutes or until onion is caramelized. Meanwhile remove pot roast from package, removing as much gravy as possible. Reserve gravy for other use. Cut pot roast into 1/2-inch pieces. Place pizza crust on ungreased large baking sheet. Top evenly with beef, onion, walnuts, cheese and red pepper. Bake in 450° oven 10 to 12 minutes or until topping is hot. Cut into 8 wedges.
Recipe provided by The Beef Checkoff.