- Cook the Pasta — Fill a large pot with salted water and bring to a boil, Cook the pasta according to the package instructions until al dente. Keep some pasta water before draining. 
- Sauté the Garlic – Melt the butter in a large pan over medium heat. Add the minced garlic, and cook for about 1 minute, stirring often, until fragrant but not browned. 
- Stir in the Milk & Greek Yogurt – After lowering the heat to low, and slowly, stir in the milk and then the Greek yogurt. Keep whisking to form a smooth paste and avoid curdling. 
- Add the Cheese — Add the grated Parmesan (or Pecorino Romano) little by little, stirring vigorouslly until completely melted and the sauce is creamy. Add reserved pasta water, as needed, to loosen consistency. 
- Combine with Pasta – Toss in the drained pasta, gently turning it over to coat every strand with creamy sauce. Let it simmer for a minute or two so the pasta takes on some flavor. 
- Finishing & Serving – Just about to stir in the finely chopped parsley for a hint of freshness. Taste and adjust seasoning if necessary, then serve immediately, with extra cheese on top. Enjoy!