Cook the pasta according to package directions. Drain and reserve 1/2 cup of the water you cooked the pasta in for the sauce. Do not rinse the pasta.
Turn off the burner and return the pasta to the warm pot, and add the cheese, greek yogurt. Add a few tablespoons of the reserved pasta water. Stir until the cheese melts and the pasta is coated. Add a few more tablespoons of the pasta water as needed until you get the right consistency.
Stir in the salt, pepper and spices. Adjust to taste.
This recipe can be super healthy with whole-wheat pasta, low-fat cheese and 0% low-fat Greek yogurt. This skinny variation works well and tastes great. To make it super creamy, use at least 2% Greek yogurt and regular cheddar cheese.