Step 1: Boil Pasta : Cook fettuccine or linguine in salted water until al dente. Reserve some pasta water and drain.
Step 2: Cook Salmon : Heat olive oil in a skillet, season salmon, and cook 3–4 minutes per side until done. Remove from skillet.
Step 3: Make Garlic Parmesan Sauce : Sauté garlic in the same skillet, add heavy cream, then stir in Parmesan cheese until smooth.
Step 4: Combine Ingredients : Add pasta to sauce, stir in spinach, lemon zest, lemon juice, and flaked salmon. Adjust sauce consistency with reserved pasta water.
Step 5: Serve : Plate pasta and garnish with parsley and extra Parmesan.