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.
1 Preheat the oven to 350 degrees. 2  Bring the steak to room temperature. 3  Rub the steak on both sides with the olive oil, salt, and pepper. Let it sit while you preheat a cast iron skillet over high heat, about 4 minutes.  Place the steak in the skillet, and don't move it for 3 minutes.