1Bring a large pot of salted water to a boil. Add the fettuccine and cook according to package instructions until al dente. Reserve 1/2 cup of pasta water, then drain the pasta.
While the pasta cooks, melt the unsalted butter in a large skillet over medium heat. Add the minced garlic and sauté for 1-2 minutes until fragrant, but not browned.
Add the lemon zest and juice to the skillet, stirring to combine with the garlic and butter.
Pour in the whole milk and bring to a gentle simmer. Let it cook for 2-3 minutes, stirring occasionally.
Add the grated parmesan cheese and stir until melted and the sauce is smooth. Season with salt and black pepper to taste.
Add the drained fettuccine to the skillet and toss to coat in the creamy lemon garlic sauce. If the sauce is too thick, add a splash of reserved pasta water until desired consistency is reached.
Serve immediately, garnished with extra parmesan and a sprinkle of black pepper if desired.