Start by melting the butter in a skillet over medium heat. Let it get bubbly, then add the minced garlic so you can smell that amazing aroma. Be careful not to let the garlic brown too much, as it can turn bitter.
Pour in the heavy cream and sprinkle in the Parmesan, stirring constantly until everything is well combined and creamy. You will know it is ready when the sauce thickens slightly and starts to coat the back of a spoon. Avoid letting it boil, though, or your sauce might separate.
Add your Sardo Marinated Seafood Salad or shrimp to the creamy mixture and let it warm through. The seafood should be heated but not overcooked, keeping it tender and delicate. Watch out—if you leave it too long, you might end up with rubbery seafood.
Toss in the cooked fettuccini and gradually add some reserved pasta water until you reach your desired sauce consistency. It should look glossy and cling to the pasta nicely. If you skip adding water, the sauce might turn too thick and clumpy.
Sprinkle in the finely ground pepper along with salt to taste, mixing well. Then, fold in the roughly chopped parsley for a fresh finish. Do not forget to save some parsley for garnish! Taste and adjust as needed.