Prep the marinade: In a bowl, whisk lime juice and zest, cilantro, garlic, olive oil, cumin, chili powder, salt, and pepper.
Marinate the chicken: Add chicken and coat well. Marinate 15–30 minutes at room temperature or up to 4 hours in the fridge.
Longer is not necessary.
Cook your base: Make rice, quinoa, or cauliflower rice according to package directions. Fluff and set aside. For extra flavor, add a squeeze of lime and a pinch of salt.
Cook the chicken: Heat a nonstick skillet or grill pan over medium-high.
Cook chicken 4–6 minutes per side, until browned and the internal temperature reaches 165°F (74°C). Rest 5 minutes, then slice.
Make the dressing: Stir yogurt, lime juice, olive oil, salt, pepper, and cumin. Thin with water to a drizzleable consistency.
Prep the veggies: Halve tomatoes, dice cucumber, slice onion, and prepare corn.
Slice avocado if using.
Assemble bowls: Add 3/4 cup base to each bowl. Top with sliced chicken, tomatoes, cucumber, onion, corn, and avocado. Drizzle with dressing.
Finish with cilantro and lime wedges.
Taste and adjust: Add a pinch of salt, another squeeze of lime, or a sprinkle of chili flakes if you like heat.