1Place 1 tablespoon of the olive oil, soy sauce, lime juice, sugar, cumin and chipotle in a large zipper-lock freezer bag. Add the flank steak and turn to coat. Set aside to marinate.
2Insert the wire rack into position 2. Set the oven to Air Fry, Super Convection, 450°F, for 6 minutes and press Start to preheat. Meanwhile, continue to the next step.
3Combine the onion, peppers, salt and the remaining oil in a large bowl. Transfer the mixture to a sheet pan, spreading it out evenly, leaving a space in the center. Place the flank steak in the center, then spoon 1 tablespoon of the marinade over the vegetables.
4Once preheated, place the pan in the oven and air fry for 6 minutes.
5When the oven signals at the end of cooking, adjust the oven to Broil, High, for 9 minutes and press Start. When there is 6 minutes remaining on the timer, turn the steak and continue cooking.
6The vegetables should be roasted and the steak cooked to medium, 135°F when tested with a meat thermometer. If not, broil it a little longer.
7Remove the pan from the oven and set aside to rest for 10 minutes, then thinly slice the steak.
8Spread a layer of sour cream on each tortilla, then add a few slices of steak followed by the roasted vegetables. Finish with a squeeze of lime juice and a light sprinkle of salt. Serve immediately and watch them disappear. Fiery, fresh, and fiesta-ready!