Prep the marinade: In a bowl, whisk lime juice, zest, garlic, olive oil, honey, cumin, smoked paprika, chili powder, salt, and pepper.
Marinate the chicken: Pound chicken to even thickness. Add to the marinade, toss to coat, and chill 20–30 minutes. Longer is fine (up to 4 hours) but not required.
Cook your base: Make brown rice or quinoa according to package directions.
Fluff and keep warm. For a low-carb option, sauté cauliflower rice with a little oil and salt for 3–4 minutes.
Prep the veggies: Chop cucumbers, tomatoes, bell pepper, and onion. Rinse black beans.
Slice avocado just before serving.
Cook the chicken: Heat a large skillet over medium-high. Lightly oil the pan. Shake excess marinade off the chicken and cook 4–6 minutes per side, until browned and the internal temperature reaches 165°F (74°C).
Rest 5 minutes, then slice.
Make the yogurt drizzle: Stir together Greek yogurt, lime juice, water, salt, and pepper until smooth.
Assemble the bowls: Add a scoop of grains to each bowl. Top with sliced chicken, black beans, and veggies. Add avocado, cilantro, and a squeeze of lime.
Finish with the yogurt-lime drizzle.