Spray a 13 x 9 inch baking sheet with a keto-friendly cooking spray and set aside. Turn on your broiler and move an oven shelf to the highest position in the oven.
While your oven heats, place the flank steak into a large bowl. Add in the flank steak, 2 tablespoons of oil, lemon juice, and the Spicy Meat rub. Mix well with your hands, turning the flank steak to coat it in the marinade. Set aside and let this marinate while you chop the vegetables.
Place chopped vegetables on the prepared sheet pan. Pour 1 tablespoon of oil over the vegetables. Add 1 teaspoon of salt. Use your hands to mix the vegetables with the oil, squishing lightly to macerate the vegetables. Move the vegetables onto one side of the sheet pan, spreading them in one thin layer.
Place the marinated flank steak on the other side of the sheet.
Broil for 6-8 minutes. Check the flank steak with a meat thermometer (135F for medium-rare). If the steak is ready, use a set of tongs to remove it to a plate. Cover the plate and allow the steak to rest for 10 minutes.
Meanwhile, toss the vegetables with the tongs, and broil for another 2-3 minutes. Remove the vegetables to a serving dish.
Slice the meat on the bias into thin slices. Serve the meat and vegetables either by themselves, or on lettuce leaves for wrapping.
You can also turn this, or the leftovers into a salad by adding a little of the spice rub seasoning to a mix of equal parts of mayo and sour cream for a dressing.
You can turn this (or the leftovers) into a salad by adding a little of the spice rub seasoning to a mix of equal parts of mayo and sour cream for dressing.
Do not overcook the flank steak or it will get dry and rubbery. If in doubt, undercook it a bit and let it sit under foil so that it can finish cooking.
The vegetables take longer to cook so remove the steak to allow the veggies to cook.