Sliced green onions and diced tomatoes for garnishoptional
Heat a tablespoon of vegetable oil in a large skillet over medium-high heat and cook onions until soft; 3-4 minutes. Add ground turkey and garlic and cook until meat is no longer pink; about 5 minutes. Drain any liquid and return meat mixture to the pan.
Stir in salsa, taco seasoning and water. Bring to a boil, then cover and reduce heat to low. Simmer for 10-15 minutes or until sauce is thickened and reduced. Stir in cheeses until melted.
Meanwhile, cook pasta to al dente according to package instructions. Drain and stir pasta into the meat mixture until coated.
Sprinkle remaining cheeses (½ cup of each) evenly over taco pasta, turn heat to low and cover for about 3 minutes or until cheese melts).
Garnish with sliced green onions and fresh diced tomatoes. Serve immediately.