Cook pasta as per packaging instructions. While waiting for pasta to cook, season chicken with garlic powder, salt and pepper.

Then, heat oil in a pan over medium-high and add in the chicken. Cook the chicken, stirring occasionally, until browned and cooked through. Remove to a plate, and set aside.

Once pasta is cooked, drain and reserve some pasta water, then set aside.

In the same pan used earlier to cook the chicken, add butter. When the butter has melted, add garlic and cook for 1-2 minutes.

Stir in the flour, and cook for another 1-2 minutes.

Add chicken broth and stir up any bits in the pan. Allow to simmer for 1 minute.

Add in milk and cream, reduce the heat and simmer until the sauce is smooth and has thickened.

Stir in parmesan and season with salt and pepper. At this point, thin the sauce with pasta water, if desired.

Add cooked chicken and pasta back into the pan. Mix well.

Remove from heat, garnish with parsley, and serve with more parmesan and pepper, if desired.