Slice the chicken breast into thin strips, then season with salt, pepper, smoked paprika, and chili powder. Toss to coat evenly.
Heat a large skillet over medium-high heat until hot, then add a tablespoon of oil. Once shimmering, add the chicken slices and sear until golden brown, about 5-7 minutes, stirring occasionally.
Remove the cooked chicken from the skillet and set aside. In the same pan, add sliced bell peppers and onions. Cook over high heat until slightly charred and caramelized, about 8 minutes, stirring frequently.
Return the chicken to the skillet with the peppers and onions. Squeeze fresh lime juice over everything and toss gently to combine. Cook for an additional 2 minutes until heated through and fragrant.
Check that the chicken is cooked through and the vegetables are nicely charred yet tender. Adjust seasoning with more salt, pepper, or lime juice if desired.
Serve the flavorful chicken and vegetables hot, straight from the skillet, with warm tortillas or your favorite sides. Enjoy the smoky, vibrant flavors with a squeeze of extra lime for brightness.