Heat olive oil in a large skillet over medium high heat.
Add garlic and cook, stirring frequently, until fragrant, about 1-2 minutes.
Stir in chicken broth, milk, butter and pasta.
Season with salt and pepper, to taste (I added ½ tsp salt and ¼ tsp ground black pepper).
Bring to a boil. Reduce heat and simmer, stirring frequently, until pasta is cooked through, about 18-20 minutes. Stir in Parmesan. If the mixture is too thick, add more milk as needed.
Serve immediately. Garnish with parsley, if desired.
Recipe by Zoom Yummy - Crochet, Food, Photography at https://zoomyummy.com/2016/01/27/one-pot-garlic-parmesan-pasta/