1. Cook pasta according to the package instructions. Meanwhile, sauté the onion in butter over medium heat for 4-5 minutes. Add the salmon and keep cooking for another 3 minutes. Add the Alfredo Sauce, salt, and pepper. Stir and turn off the heat.
2. Add the cooked pasta, parmesan cheese, and chopped parsley, mixing everything together thoroughly. Sprinkle with more cheese and parsley before serving.