Chicken and Pepper Fajitas

In a medium bowl or resealable plastic bag, combine garlic, lime juice, cumin, 2 teaspoons salt, and 1/2 teaspoon ground pepper; add chicken, and turn to coat.

Heat 2 tablespoons oil in a large skillet over medium heat. Add chicken breasts; cook until opaque throughout, 6 to 8 minutes per side. Transfer chicken to a plate; wipe skillet with a paper towel.

Heat remaining tablespoon oil in skillet. Add peppers and onion; season with salt and pepper. Cook, tossing frequently, until vegetables are crisp-tender, 5 to 7 minutes.

Thinly slice chicken; serve with cooked vegetables and desired accompaniments, letting guests assemble their own fajitas.