Recipes Ingredients Meat & Poultry Beef Recipes Flank Steak and Red Onion 3.4 (20) Close Prep Time: 25 mins Total Time: 35 mins Servings: 4 Caramelize an onion on the grill and pile the slices atop steak for a slightly sweeter take on a summertime favorite. Directions Heat grill to high. Rub both sides of steak with oil, and season generously with salt and pepper. Grill for 5 to 7 minutes per side for medium-rare. Let rest for 10 minutes. Meanwhile, drizzle onion slices with oil, and season with salt and pepper. Grill, turning occasionally, until cooked through, 6 to 8 minutes per side. Thinly slice meat across the grain, and serve topped with grilled onion.