Get a food processor: Add 1/2 C. chopped fresh rosemary, garlic, 1/3 C. olive oil, 1/4 C. lemon juice, black pepper, 1/2 tsp red pepper flakes, and 1/2 tsp salt then process them until they becomes finely minced.

Pierce the steak several times with a fork for 15 to 20 min.

Place the steak in a large zip lock bag.

Place the steak in it and pour on it the marinade.

Place the steak marinade for 6 h in the fridge.

Get a small mixing bowl: Whisk 1/3 C. olive oil, 3 tbsps lemon juice, lemon zest, 1 tsp minced rosemary, 1/8 tsp red pepper flakes, and a pinch of salt.

Place the dressing in the fridge until ready to serve.

Before you do anything grease the grill and heat it.

Drain the steak from the marinade then season it with some salt and pepper.

Grill the steak for 9 min on each side while basting it with 2 tbsps of the dressing.

Cover the steak with a piece of foil and let it rest for 6 min.

Serve it with the dressing.