Remove the steaks from the marinade and discard the marinade. Let steaks sit at room temperature while you make the topping.
In a small skillet, melt the butter over medium heat. Add 3 minced garlic cloves and sauté 1 minute. Add the onions and sauté until soft. Stir in the sun-dried tomatoes, oregano, olives and feta and sauté 2 minutes. Remove from heat and set aside.
Oil the grill grate. Place the steaks on the grill and grill 5 minutes or until you get good grill marks. If desired, turn on an angle and cook 1 to 2 minutes to get nice cross-hatch marks. Turn and continue grilling until the steak is cooked to the desired degree of doneness. Cover with the topping and drizzle with remaining marinade, if desired.
Nutrition information per serving of 5-ounce steak:
Calories422Fat23 gSodium641 mg
Carbohydrates7 gSaturated fat9 gProtein45 gCholesterol112 mgDietary fiber1 g