Ingredients:

2 boneless beef top loin steaks or 1 boneless beef top sirloin steak, cut 1-inch thick (about 1 1/4 pounds)
1 large Vidalia or other sweet onion, sliced (1/2-inch)
3 tablespoons light teriyaki sauce

Peanut Sauce:
2 tablespoons light teriyaki sauce
2 tablespoons creamy peanut butter
1/8 to 1/4 teaspoon crushed red pepper

Method:

1. Brush beef steaks and onion with 3 tablespoons teriyaki sauce. Place on grid over medium, ash-covered coals. Grill top loin steaks, uncovered, 15 to 18 minutes (top sirloin steak 17 to 21 minutes) for medium rare to medium doneness, turning occasionally. Grill onion 15 to 20 minutes or until tender, turning occasionally.
2. Using fork, gradually stir 2 tablespoons teriyaki sauce and 2 tablespoons water into peanut butter in small bowl until smooth; stir in red pepper.
3. Carve steaks. Serve with onion and peanut sauce.