Start by cutting the chicken breast into 1-inch pieces.
skinless chicken breasts
In a skillet, melt butter and cook the chicken until slightly browned.
Butter
Add minced garlic and sauté for another minute.
Garlic
Next, add uncooked pasta and chicken broth to the skillet, stirring to dissolve any browned bits.
Penne pasta, Chicken broth
Cover the skillet and let it come to a boil, then reduce the heat and let it simmer until the pasta is tender.
Stir in milk, cream cheese, and pesto until the sauce is creamy and combined.
Milk, Cream cheese, Basil pesto
Finally, add grated Parmesan and optional add-ins like spinach and sun-dried tomatoes.
Grated Parmesan, Freshly cracked pepper and crushed red pepper