Add ground beef to the skillet, cook for 5-7 minutes until browned, then drain excess fat. Season with salt and pepper.
Sprinkle taco seasoning over beef, stir to coat, then pour in tomato sauce. Simmer for 5 minutes until thickened.
Prepare toppings: warm corn and black beans, slice avocado, halve cherry tomatoes, and chop cilantro.
Assemble bowls: start with rice, add beef mixture, then top with corn, black beans, tomatoes, avocado, cheese, and cilantro. Squeeze lime over before serving.
Notes
For extra flavor, add hot sauce or salsa to taste.