Lightened-Up Fettuccine with Cauliflower Alfredo Sauce

Name: Lightened-Up Fettuccine with Cauliflower Alfredo Sauce
Cuisine: European, Mediterranean, Italian
Ingredients: 1 large head cauliflower, cut into florets (about 5 cups florets); ½ cup milk; ½ cup grated Parmesan cheese, plus more for serving; 2 tablespoons unsalted butter; 5 garlic cloves, minced; Kosher salt and freshly ground black pepper; 1 pound fettuccine or other long pasta