In a skillet on medium heat, add in the olive oil, onion, red bell peppers, garlic, and salt. Sauté for 3-5 minutes, until the onions have softened.
Next, add in the ground beef. Season with more salt and taco seasoning. Cook until it is brown, around 7-10 minutes, using a wooden spoon to break up the pieces as you cook.
When done, add in tomato paste and stir until mixed in.
Next, add in the cooked rice along with ¼ cup of water (or beef broth). Stir until everything has been combined.
Add in the frozen corn, grape tomatoes, and shredded cheese. Stir to combine.
Serve when done with toppings of your choice such as avocados.