In a large skillet over medium heat, bring water to a boil. Add your pasta and cook according to package instructions until al dente. Drain and set aside.

In the same skillet, add the ground beef or turkey. Cook until browned and fully cooked through, about 5–7 minutes. Make sure to break the meat apart with a spatula.

Once the meat is cooked, drain any excess fat. Sprinkle the taco seasoning over the meat, mixing well to coat. Stir in the diced tomatoes (with the juices) and one cup of water. Bring to a simmer.

Once the meat mixture starts bubbling, add the cooked pasta and corn (if using). Stir well to combine all the flavors.

Reduce the heat to low, stir in the shredded cheddar cheese, and continue to stir until the cheese has melted and the mixture is creamy.

Remove from heat and top with chopped green onions if desired. Serve warm and enjoy!