Heinen’s 4PM Panic: Grilled Flank Steak with Chimichurri Flank steak is a lean, but flavorful cut of beef that benefits from the tenderizing effects of a marinade. It is best cooked medium rare and thinly sliced at an angle across April 5, 2016 4PM Panic/Barrington Eats/Cooking/Cooking with Heinen's/Food/Heinen's 4PM Panic/Heinen's Grocery/Recipes/The List Year to Date/Things to Do