In 10-inch nonstick skillet, cook sausage over medium-high heat 6 to 8 minutes or until no longer pink. Remove sausage to medium bowl. Reserve 1 tablespoon liquid in skillet. Reduce heat to medium. Add bell pepper and onion to skillet; cook 5 to 7 minutes, stirring occasionally, until tender. Remove from skillet; add to sausage in bowl.