Instructions
Cook pasta according to package directions. Drain and set aside.
Meanwhile, in a large saucepan, melt butter over medium heat. Add garlic and cook, stirring, for 1 minute.
Add flour and cook, stirring constantly, for 1 minute more.
Add milk and broth and cook, stirring constantly, until the sauce boils and thickens, about 5 minutes.
Add Parmesan, parsley, garlic salt and pepper. Continue stirring until the cheese has melted.
Add pasta to the sauce and stir to combine. Add mozzarella and stir until melted.
Serve warm.
Enjoy your delicious homemade penne pasta!