Combine garlic through oil for marinade in ziplock bag. Add flank steak to bag and let sit flat and sealed in fridge for at least 2 hours or overnight if possible.
Prepare a grill for direct heat. Remove the steak from the marinade and season both sides liberally with salt and pepper.
Place the flank on the grill and cook both sides for 5-6 minutes cooking the steak to medium rare.
Allow steak to rest on cutting board for 5-10 minutes before slicing.
Using a sharp knife cut the steak against the grain at an angle.
Recipe by How to Decorate at https://www.ballarddesigns.com/howtodecorate/2014/06/recipe-grilled-flank-steak/