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 Place a tablespoon of unsalted butter on each of the steaks and place the skillet directly in the oven. 2  Turn the heat down to 125 degrees Fahrenheit (51.6 degrees Celsius). 3  Cook the steaks in the oven for eight to 12 minutes.4  Cut into one of the steaks to see if it's cooked to your taste. Preheat your oven to 400 degrees Fahrenheit (204.4 degrees Celsius). 2  Heat your cast iron skillet over a high heat for five to seven minutes. 3  Pat your steaks dry with the paper towel. 4  The drier they are, the crisper the layer of flavor will be on the steak.