Flank Steak Marinade

In a large bowl, whisk together olive oil, soy sauce, lime juice, and brown sugar. Add steak and toss until coated. Marinate for at least 30 minutes, up to 2 hours.

Remove steak from marinade and pat dry with paper towels. Season lightly with salt (remember that there's soy sauce in the marinade) and pepper.

<strong>To grill:</strong> Preheat grill to medium-high. Place steak on grill and cook to your liking, starting at 5 minutes per side for medium-rare. (Cooking time will vary due to thickness of your steak.) Use a meat thermometer to check the internal temperature—130°F for medium-rare. 

<strong>To broil:</strong> Preheat oven broiler to high. Place steak on a sheet pan and cook, turning once halfway through, until cooked to your liking, starting at 5 minutes per side for medium-rare. (Cooking time will vary due to thickness of your steak.) Use a meat thermometer to check the internal temperature—130°F for medium-rare. Let rest before slicing and serving.