We doubled the recipe..thinking I was going to have some left over for 2 of us. Was I wrong. These were fantastic and really easy. Note to self: you can make these ahead of time but tossing the zucchini into a bag and leaving until ready to dump on the cookie sheet.
Drizzle vegetable oil into an aluminum or cast-iron pan, and heat the pan on the stove until the oil just begins to smoke. Add your flank steak to the pan. Cook one steak at a time. Sear each side of the flank steak for 2 to 4 minutes. Use fork or tongs to turn the flank steak once. Test the flank steak with a meat thermometer for at least an internal temperature of 145 F right before you anticipate the cooking time for your steaks to end.
Cook 1 to 2 minutes without moving; turn with tongs and cook another 1 to 2 minutes. Remove from heat and put the cast iron skillet with the steaks in it into the oven. Cook an additional 3 to 5 minutes, depending on thickness of steaks and degree of doneness you like.emove your steaks from the refrigerator at least 30 minutes before you plant to cook them-sometimes as long as 60 minutes (depending on size). Pat the steaks dry with a paper towel. You want to have a completely dry steak before cooking.