Brown the ground beef in a large skillet over medium-high heat.
Add the finely chopped onion, red bell pepper, taco seasoning, minced garlic, salsa, diced tomatoes with green chilies, black beans, and corn to the skillet.
Mix everything together thoroughly and set the mixture aside.
Lightly spray the inside of your crockpot with non-stick cooking spray.
Spread the cooked rice evenly across the bottom of the crockpot.
Sprinkle half of the shredded cheese over the rice.
Evenly distribute the meat mixture on top of the cheese layer.
Top with the remaining shredded cheese.
Cover with the lid and cook on high for 2-3 hours.