In a medium sized saucepan over high heat, heat olive oil until shimmering, add garlic and steak; sauté until steak is barely pink inside, about 2 to 3 minutes. Add onions, peppers, mushrooms and seasoning, cook for 3 to 4 minutes or until vegetables soften; stir cheese into beef mixture and set aside. In a separate pan, grill buttered Hoagie buns until crispy and golden, about 2 to 3 minutes. Place filling onto buns and serve. Makes 2 servings.