Place steaks on a baking sheet; sprinkle with salt, pepper and 3 cloves of minced garlic. Set aside to marinate at room temperature while you prepare the mushrooms.
Heat the olive oil in a medium skillet over medium heat. Add mushrooms; saute for 5 minutes. Add shallots, remaining 2 cloves of minced garlic, the parsley and the white wine; saute for 2 minutes.
Preheat grill to MEDIUM. Grill steaks for 5 minutes per side or until desired level of doneness is achieved.
Serve steaks with mushrooms.