Boil the pasta: Bring a large pot of salted water to a boil. Cook pasta until just al dente.
Reserve 1 cup of pasta water before draining.
Sauté the garlic: In a large skillet over low heat, melt 1 tablespoon butter. Add minced garlic and cook 30–60 seconds until fragrant. Don’t brown it.
Blend the base: In a blender, add 1 cup low-fat cottage cheese, 1/2 cup Greek yogurt, 1/2 cup grated parmesan, 1/2 cup warm broth, sautéed garlic with butter, a squeeze of lemon juice, a pinch of nutmeg, and black pepper.
Blend until completely smooth and creamy.
Warm the sauce gently: Pour the blended sauce back into the skillet over low heat. Stir constantly for 2–3 minutes. If it thickens too quickly, loosen with a splash of broth or pasta water.
Taste and adjust: Add salt to taste, more pepper if you like, and another small squeeze of lemon for brightness if needed.
Combine with pasta: Add cooked pasta to the skillet.
Toss for 1–2 minutes, adding reserved pasta water a little at a time until the sauce coats every strand and looks glossy.
Finish and serve: Top with extra parmesan and chopped parsley. Serve immediately while the sauce is silky.