In a large skillet, heat over medium heat until hot, then add lean ground beef. Cook for about 5-6 minutes, stirring occasionally until the beef is browned and no longer pink.

Once the beef is browned, add the diced onions and minced garlic to the skillet. Sauté for about 3-4 minutes, stirring frequently, until the onions are translucent and fragrant.

Next, stir in the diced tomatoes and Greek yogurt, mixing thoroughly. Allow the mixture to cook for an additional 3-4 minutes until creamy and warmed through.

Toss in your cooked pasta into the sauce mixture, ensuring that every piece is evenly coated with the creamy sauce. This step should take about 2 minutes.

Sprinkle in the grated Parmesan cheese and stir continuously for about 2 minutes until melted and the sauce thickens.

If the sauce seems too thick, add a splash of water or broth gradually, stirring continuously until the desired consistency is reached.