Bring a pot of salted water to a boil and add the pasta. Cook 2-3 minutes less than al dente. Drain pasta. Reserve 1 cup of pasta water in case you need it.
10 ounces macaroni
In an oven-safe casserole dish or skillet, melt the butter over medium heat. Add the flour and spices. Whisk together until a paste forms. Let it cook for about a minute. Slowly whisk in the milk until the sauce is smooth. Add in the diced green chiles and season with salt and pepper.
2 tablespoons butter, 2 tablespoons all-purpose flour, 2 cups 2% milk, ½ teaspoon cumin, ½ teaspoon chili powder, Salt and freshly ground black pepper to taste, 8 ounces green chiles
Continue whisking until the sauce has thickened, about 3-4 minutes. Remove the skillet from the heat and whisk in the Greek yogurt. Add in 1 and 1/2 cups of the cheese and whisk until melted. Add the pasta to the skillet and stir until it's fully coated with the sauce.
1 cup Monterey cheese, ⅓ cup Greek yogurt, 1 cup sharp cheddar
Top with the remaining 1/2 cup of cheese and then bake uncovered for 20 minutes. Switch the oven to broil and bake until the top is browned and crisp.