Fire up the barbecue for some great grilled steak. Grill onions and mushrooms to accompany the steak.
Mix garlic powder, seasoned salt and seasoned pepper. Brush steaks and vegetables lightly with oil. Sprinkle with seasoning mixture.
Grill steaks over medium-high heat 6 to 8 minutes per side or until desired doneness.
Grill onions and mushrooms in grill basket or on foil 6 to 8 minutes or until tender, turning occasionally. Serve steaks topped with grilled onions and mushrooms.