In a large mixing bowl, combine diced chicken breast, olive oil, chili powder, garlic powder, cumin, paprika, salt, and pepper. Mix well until each piece is thoroughly coated. Let it sit for at least 30 minutes.
Prepare your grill or skillet by heating it to medium-high while the chicken marinates.
Add the marinated chicken to the hot grill or skillet. Cook for 7-10 minutes on each side, until done.
Warm the corn tortillas. Directly over flame for seconds per side or using a skillet to make them pliable.
Place cooked chicken onto each tortilla. Add toppings like onions, cilantro, salsa. Serve with lime wedges.
Notes
Leftover chicken can be stored in an airtight container in the fridge for up to 3 days. Reheat on a skillet for best texture.