1. Cook the ground meat: Heat olive oil in a skillet over medium-high heat. Add ground meat and cook until browned, breaking it up with a spoon. Drain excess fat.
2. Sauté aromatics and season: Add chopped onion to the skillet with the meat and cook until softened, about 5 minutes. Stir in minced garlic, chili powder, cumin, paprika, cayenne (if using), salt, and pepper. Cook for 1-2 minutes until fragrant.
3. Prepare Cilantro-Lime Crema: In a small blender or food processor, combine Greek yogurt (or sour cream), cilantro, lime juice, garlic, and salt. Blend until smooth.
4. Assemble the bowls: Divide the cooked rice among four meal prep containers. Top each with a portion of the seasoned ground meat mixture.
5. Add toppings: Add the rinsed black beans, corn, shredded lettuce, chopped tomatoes, chopped red onion, and cilantro to each container. Keep components relatively separate to maintain freshness.
6. Store and chill: Seal the containers tightly and refrigerate. The crema can be stored in a separate small container or added just before serving.
7. To serve: Drizzle with Cilantro-Lime Crema and enjoy.