1. Marinate the chicken: Ina bowl, combine 2 pounds of boneless, skinless chicken breast or thighs, 2tablespoons of lime juice, 1 tablespoon of olive oil, 1 teaspoon of chili powder, 1 teaspoon of ground cumin, 1/2 teaspoon of black pepper, and a pinch of red pepper flakes. Mix well and let the chicken marinate for at least 30minutes.
2. Cook the peppers and onions: Heat 2 tablespoons of olive oil in a heavy skillet or cast iron skillet over medium heat. Add 1 sliced yellow onion, 1 sliced green bell pepper, and 1 sliced red bell pepper. Cook for 5-7 minutes, until the vegetables are tender.
3. Cook the chicken: Remove the chicken from the marinade and add it to the skillet with the peppers and onions. Cook for about 6-8 minutes, or until the chicken is cooked through and no longer pink in the center.
4. Warm the tortillas: While the chicken is cooking, warm your tortillas. You can do this by wrapping them in foil and placing them in a preheated oven at 350°F for about 10 minutes, or by heating them on a dry skillet over medium-high heat for about 30 seconds on each side.
5. Serve and enjoy: Slice the cooked chicken into strips and serve it with the peppers and onions in warmed tortillas. Top with your favorite toppings such as sour cream, fresh cilantro,shredded cheddar cheese, and homemade salsa. Serve with lime wedges for an extra burst of flavor.