Ingredients
1 cup packed brown sugar1 cup soy sauce1 teaspoon each garlic powder, ground mustard and ground ginger1 pound beef top sirloin steak, cut into 1-inch pieces1 medium zucchini, cut into 1/4-inch slices1 medium yellow summer squash, cut into 1/4-inch slices1 medium sweet red pepper, cut into 1-inch pieces1 medium red onion, cut into eight wedges, optional
Preparation
In a small bowl, combine the brown sugar, soy sauce, garlic powder, mustard and ginger. Place beef in a large resealable plastic bag; add 1 cup marinade. Seal bag and toss to coat. Place zucchini, yellow squash, red pepper and onion if desired in another resealable plastic bag; add remaining marinade and toss to coat. Refrigerate beef and vegetables for at least 4 hours, turning occasionally.
Drain and discard marinade. On eight metal or soaked wooden skewers, alternately thread beef and vegetables. Grill, covered, over medium-hot heat or broil 4-6 in. from the heat for 10 minutes or until meat reaches desired doneness, turning occasionally.
