Cook the base grain: Rinse 1 cup brown rice. Cook according to package directions until fluffy.
Fluff with a fork, squeeze in half a lime, and season with a pinch of salt. Set aside to cool slightly.
Make the spice rub: In a small bowl, mix cumin, smoked paprika, chili powder, garlic powder, oregano, 1/2 teaspoon salt, and a few grinds of black pepper.
Season the chicken: Pat the chicken dry. Drizzle with 1 tablespoon olive oil and coat evenly with the spice rub.
Let it sit 10 minutes while you prep veggies.
Chop the vegetables: Dice bell pepper, red onion, zucchini, and halve the cherry tomatoes. Rinse and drain black beans and thaw corn.
Cook the chicken: Heat a large skillet over medium-high. Add the chicken and cook 5–6 minutes per side, or until the internal temperature reaches 165°F (74°C).
Rest 5 minutes, then slice into strips or cubes.
Sauté the veggies: In the same skillet, add remaining 1 tablespoon olive oil. Add onion, bell pepper, and zucchini with a pinch of salt. Cook 4–5 minutes until slightly tender but still crisp.
Stir in corn and warm through for 1–2 minutes.
Toss the beans: In a bowl, combine the black beans with a squeeze of lime, 2 tablespoons salsa, and a handful of chopped cilantro. Season to taste.
Mix a quick salsa-lime drizzle: In a cup, stir together remaining salsa and juice of 1 lime. This brightens the bowls without heavy dressing.
Assemble the containers: Divide rice among 4 meal prep containers.
Top with sliced chicken, sautéed veggies, black beans, and cherry tomatoes. Spoon over the salsa-lime drizzle.
Add fresh elements later: Store avocado and any dairy toppings separately. Add them right before eating to keep textures fresh.
Cool and seal: Let containers cool to room temperature (no more than 1 hour), then seal and refrigerate.