Heat a large cast iron skillet or pan over high heat, add 1 tbsp of oil, and let heat up for a couple of minutes.
Add the steak to the pan and fry on each side for about 3-5 minutes or longer. Remove the steak from the pan and allow to rest.
Add the remaining tablespoon of oil to the pan over high heat, add in the onions and bell peppers. Let the veggies begin to sizzle and toss as necessary, cook for a total of 2-3 minutes.
Add meat back in along with all of the spices and garlic. Cook until desired tenderness on the veggies.
Remove from heat and pour on lime juice. Toss to coat. Serve with keto tortillas or on top of a bed of greens.