I start by bringing a large pot of salted water to the boil, then cooking the pasta (spaghetti or penne or fusilli) until al dente according to package instructions. Right before draining, I reserve about ½ cup of the starchy cooking water.
Meanwhile, I heat 1 Tbsp of olive oil in a large skillet over low heat. I gently fry 1–2 cloves of minced garlic (and optionally chili flakes) for 2–3 minutes until fragrant—not letting it burn. Then I stir in the cream cheese and about ½ cup of the reserved pasta water, creating a creamy emulsion. I add the grated Parmesan and combine until smooth.
I drain the pasta and add it into the skillet with the sauce. I toss well so every strand or piece is coated, adding a splash more pasta water if needed to reach a silky, smooth consistency. Finally, I serve immediately with a drizzle of good olive oil, extra Parmesan and freshly ground black pepper (or chili flakes if you like heat).