01 -
Bring a large pot of salted water to a boil. Cook the penne until al dente, approximately 9 minutes. Reserve one cup of pasta cooking water before draining.
02 -
Heat butter in a large skillet over medium heat. Add diced onions and cook, stirring occasionally, until softened and translucent, about 5 minutes.
03 -
Add the salmon pieces to the skillet. Season with salt and pepper. Gently break the salmon into smaller chunks as it cooks until just opaque and tender, approximately 4 minutes.
04 -
Pour in the heavy cream and let it simmer gently. Season with salt and pepper. As the sauce thickens, add reserved pasta water gradually if needed to achieve a silky consistency.
05 -
Add cooked pasta, grated Parmesan, and most of the chopped parsley to the skillet. Toss thoroughly to coat evenly. Adjust salt to taste.
06 -
Sprinkle remaining parsley over the pasta before serving for freshness.