While still reasonably priced, flank steak is a quick-cooking upgrade from the ground beef our family usually eats in tacos. Marinate the flank steak the night before so it’s ready for a quick sear in the cast iron skillet whenever you’re ready to eat. Warm up the tortillas and add your favorite toppings. We love sour cream, salsa, and cilantro. Serve them with tortilla chips and salsa.
