In a large skillet, heat 1 tablespoon of olive oil over medium heat. Add the ground beef or turkey, season with salt and pepper, and cook until browned, about 5-7 minutes. Drain excess fat if necessary.
Stir in the taco seasoning and 1/4 cup of water. Cook for an additional 5 minutes, allowing the flavors to meld.
While the meat is cooking, prepare the rice according to package instructions if not already cooked.
In a separate pot, heat the black beans and corn over low heat until warmed through, about 5 minutes.
To assemble the taco rice bowl, start with a base of cooked rice in each bowl.
Top the rice with the seasoned meat, followed by black beans, corn, diced tomatoes, shredded lettuce, and shredded cheddar cheese.
Finish with a dollop of sour cream, diced avocado, and a sprinkle of sliced green onions.
Serve immediately and enjoy your savory taco rice bowl!