Heat grill. Melt butter in small skillet over medium heat. Add flour; cook and stir until well combined. Add all remaining sauce ingredients; cook until smooth and thick, stirring constantly. Cover to keep warm.
Brush steaks with olive oil. Sprinkle garlic-pepper blend evenly over 1 side of each steak.
When ready to grill, place steaks on gas grill over medium heat or on charcoal grill 4 to 6 inches from medium coals. Cook 8 to 10 minutes or until of desired doneness, turning once.
To serve, place each steak on individual serving plate. Top each with peppercorn sauce.