Step 1

Place chicken in a large Ziploc bag or place on a baking sheet. Pierce the chicken all over with a fork. Drizzle with oil, garlic salt, and pepper. Let marinate. If you have the time, let the chicken marinate for at least 30 minutes (4-8 hours is ideal).

Step 2

Preheat grill* to medium heat. Brush grill with oil to prevent sticking. Place chicken on the grill. Cook for approximately 5 - 6 minutes per side, depending on the thickness of chicken. The internal temperature of the chicken should reach 165 degrees. Remove chicken from grill and let rest for 5 minutes.

Step 3

In skillet, over medium heat, add butter and let it begin to melt. Stir in diced garlic and let simmer for 1 minute. Stir in flour and stir quickly to form a paste. Quickly stir in chicken broth and use whisk to remove any lumps.

Step 4

Stir in 1% milk. Let simmer for 6-8 minutes or until it starts to thicken. Turn heat to medium-low and add parmesan cheese (a little at a time, stirring after each addition). Add more salt and pepper, to taste. Remove from heat and let thicken.

Step 5

Meanwhile, place water in large pot and bring to boil. Generously salt boiling water. Add fettuccine and cook according to package instructions. Toss fettuccine with alfredo sauce and top with extra parmesan cheese, if so desired.

Step 6

Slice the grilled chicken on the diagonal and place on the fettuccine alfredo.