1-1/2 pounds boneless beef top sirloin, cut into 1-inch cubes
2 medium red onions, cut into wedges
1 each large sweet red, yellow and green peppers, cut 1-inch pieces
1 fresh pineapple, peeled and cut into chunks or 1 can (8 ounces) pineapple chunks
Crisco® Original No-Stick Cooking Spray
In a small bowl, combine vinegar, lemon juice, garlic powder, salt, pepper and olive oil. Pour into a large resealable plastic bag; add the beef. Seal bag and turn to coat; refrigerate 5 hours or overnight.
Coat broiler pan or grill rack with nonstick cooking spray; heat broiler or grill. Drain and discard marinade from beef. On 4 metal or soaked wooden skewers, alternately thread meat, vegetables and pineapple. Season with salt and pepper. Broil 5-8 minutes, turning once, or grill, covered, over medium-hot heat for 8-10 minutes or until meat reaches desired doneness, turning occasionally.