STEP-1
STEP-2
In a medium bowl, whisk milk, mustard, flour, salt and pepper.
STEP-3
Heat oil in a small saucepan on medium-high heat. Add garlic and cook until fragrant and lightly browned (stirring constantly) about 1 minute. Pour in the milk mixture and whisk. Continue stirring as you bring to a simmer. Cook until thick, 1 to 2 minutes. Stir in lemon zest and juice.
STEP-4
Stir this sauce into the pasta and cook over medium-high heat. Cook until sauce is thick and creamy. Mix grated Parmesan cheese into the pasta.
STEP-5
Top with remaining shaved Parmesan cheese as a topping.