To a small bowl, add the ingredients for the seasoning blend, and mix well.
In a large bowl, add the ingredients for the marinade, and mix well. Then add in the steak strips, tossing to evenly coat. Cover, and let marinate 30 minutes or up to 4 hours.
Heat a large skillet over medium-high heat. Add 1 tablespoon canola or avocado oil.
Once pan is really hot, add bell peppers, onions, and the remaining seasoning. Cook about 5 minutes, occasionally stirring.
Turn off the heat. Remove the veggie mixture from the pan, place in a bowl, cover and set aside.
Wipe down any excess liquid left in the pan with a paper towel.
Turn the heat back onto medium-high. Add 1 tablespoon of canola or avocado oil. Once really hot, add half of the marinated steak strips. Cook about 4-5 minutes, or until cooked through.
Remove the steak from the pan, and place in the bowl with veggies. Cook the remaining beef. Once done, add the reserved veggies and beef back in.
Toss until well combined. Remove from the heat, garnish with cilantro, and squeeze in juice of half of a lime.
Serve with warm tortillas, and optional toppings/sides such as: lime wedges, shredded cheese, guacamole, hot sauces, Mexican Crema, rice, beans.*See blog notes for more ways to serve!