Cook the base grain: Prepare the brown rice or quinoa according to package instructions. Fluff and set aside.
Sauté aromatics: Heat the oil in a large skillet over medium heat. Add onion and bell pepper and cook 3–4 minutes until slightly softened.
Add garlic and cook 30 seconds more.
Brown the turkey: Add ground turkey to the skillet. Season lightly with salt and pepper. Cook, breaking it up with a spoon, until no longer pink, about 5–7 minutes.
Add veggies and seasoning: Stir in zucchini, taco seasoning, tomato paste, and a splash of broth.
Cook 3–4 minutes, letting the spices bloom.
Stir in beans, corn, and salsa: Add black beans, corn, salsa, and the rest of the broth. Simmer 5 minutes until everything is hot and slightly thickened. Adjust salt to taste.
Assemble the bowls: Divide rice or quinoa into 4 meal prep containers.
Spoon the turkey mixture over the grains. Squeeze lime over each portion and sprinkle with cilantro.
Cool and store: Let the bowls cool uncovered for 15–20 minutes, then seal and refrigerate.
Serve: Reheat and top with a dollop of Greek yogurt, chopped avocado, extra salsa, or shredded lettuce if you like.