One Pot Chicken Mozzarella Pasta

penne

olive oil, separated

whole boneless, skinless chicken breasts, diced into bite-sized pieces

Salt/Pepper

yellow onion, diced

garlic, minced

jar marinara sauce

red pepper flakes (optional)

+ ½ cups chicken broth

cream cheese, at room temperature

fresh mozzarella, cut into cubes

basil leaves, chiffonade