This delicious stir-fry recipe combines ground beef with a variety of colorful vegetables. Using a food processor to chop the vegetables makes the preparation quick and easy. Simply pulse the bell peppers, carrots, and onions in the food processor until finely chopped. In a hot skillet, brown the ground beef and then add the chopped vegetables. Stir-fry until the beef is cooked through and the vegetables are tender-crisp. Season with soy sauce, garlic, and ginger for added flavor. Serve over steamed rice or noodles for a satisfying meal.