Slice bell peppers into ¼-inch strips and onions thinly against the grain.
Mix marinade: Combine olive oil, lime juice, sugar, garlic, and spices. Marinate chicken for at least 15 minutes (up to 24 hours for best flavor).
Cooking Steps:
Heat 2 tbsp olive oil in a large skillet over medium-high heat until shimmering.
Sear chicken for 5-6 minutes per side until golden and fully cooked (165°F internal temperature). Remove and let rest.
In the same pan, sauté onions and peppers for 5-10 minutes until softened and caramelized. Deglaze the pan with balsamic vinegar, if desired.
Add chicken back to the skillet. Sprinkle with additional chili powder, cumin, and smoked paprika. Toss everything together. Let simmer for 2-3 minutes.
Serving:
Serve hot with rice, tortillas, or as-is for a low-carb option.
Notes
Variations: Swap chicken for tofu, pork, or shrimp. Add mushrooms or zucchini for more vegetables.
Storage: Refrigerate leftovers for 3-5 days or freeze for up to 3 months.
Reheating: Oven (350°F for 10-15 minutes), stovetop, or microwave with a damp paper towel to retain moisture.
Pairings: Serve with chimichurri, garlic spinach, or roasted asparagus.