Grilled Rosemary - Black Cherry Balsamic Flat Iron Steak

Oh man. This steak. This STEAK. Grilled Rosemary and Black Cherry Balsamic Steak. It. Is. Heavenly. There are no other words to describe it.
Ingredients:
6 cloves garlic, minced
1/4 cup Rosemary Olive Oil
1/4 cup Black Cherry Balsamic Vinegar
1/2 cup dry red wine, divided into 1/4 cups (come in and shop our collection of wine!)
2 tablespoons chopped fresh rosemary, divided
3/4 teaspoon salt
1/2 teaspoon black pepper
1 1/4 pound flat iron steak
Directions:
In a bowl whisk together garlic, olive oil, balsamic, 1/4 cup red wine, 1 tablespoon chopped rosemary, salt and pepper.
Place flat iron steak in a resealable plastic bag. Pour marinade over the top. Shake to coat steak in marinade. Refrigerate for 8 hours or overnight.
When you're ready to cook, preheat your grill to medium-high heat.
Place the steak on the grill and reserve the marinade. Cook steak 3 - 4 minutes per-side for medium rare. Remove steak from grill and let rest for 10 minutes. Remember the steak will continue to cook a bit while resting
Meanwhile, pour marinade into a skillet over medium heat. Pour in remaining 1/4 cup of red wine. Bring to a boil and allow to cook until it reduces by half, 5 - 10 minutes. Stir in remaining tablespoon of fresh rosemary. Remove from heat.
After steak has rested, slice it against the grain into 1/2 inch slices. Spoon sauce over the top and serve.