Cook your base: Prepare rice or quinoa according to package directions. Fluff and keep warm, or chill for meal prep.
Mix the seasoning: In a small bowl, combine chili powder, smoked paprika, cumin, garlic powder, onion powder, oregano, salt, black pepper, and cayenne (if using).
Season the chicken: Pat the chicken dry.
Toss with 1 tablespoon olive oil and about two-thirds of the seasoning blend until well coated.
Prep the veggies: Toss sliced peppers and onions with the remaining 1 tablespoon olive oil and the rest of the seasoning.
Sear the chicken: Heat a large skillet over medium-high heat. When hot, add the chicken in a single layer. Cook 4–6 minutes, stirring once or twice, until cooked through with golden edges.
Transfer to a plate and tent with foil.
Cook the veggies: In the same skillet, add the peppers and onions. Cook 5–7 minutes, stirring occasionally, until tender-crisp with charred spots. If the pan looks dry, add a splash of water to deglaze and lift the flavorful bits.
Combine and brighten: Return the chicken to the skillet with the veggies.
Squeeze in half a lime and toss. Taste and adjust salt, pepper, or lime as needed.
Warm beans and corn: In a small saucepan or the microwave, warm the black beans and corn with a pinch of salt and a squeeze of lime.
Assemble the bowls: Add a scoop of rice or quinoa to each bowl. Top with chicken and veggies, black beans, and corn.
Add avocado, a dollop of Greek yogurt, salsa, cilantro, and a lime wedge.
Serve or store: Enjoy right away, or let everything cool before meal-prepping in sealed containers.