Heat large nonstick skillet over medium heat until hot. Add Ground Beef, bell pepper and onion; cook 8 to 10 minutes, breaking beef up into 3/4-inch crumbles and stirring occasionally.
Cook's Tip: Cooking times are for fresh or thoroughly thawed Ground Beef. Ground Beef should be cooked to an internal temperature of 160ºF. Color is not a reliable indicator of Ground Beef doneness.
Stir in vegetable juice, brown sugar and Worcestershire sauce; bring to a boil. Reduce heat; simmer, uncovered, 7 to 9 minutes or until most of the liquid has evaporated and thickens slightly, stirring occasionally.
Evenly place beef mixture on bottom half of each bun; close sandwiches.