Chipotle Chicken Filling for Quesadillas

Heat a saucepan over medium heat; add oil. When oil is hot, add onion, garlic, oregano, and pepper; cook until onion is translucent, 3 to 5 minutes. Add stock and chicken; bring to a simmer, cover, and cook until chicken is cooked through, about 10 minutes. Remove chicken from pan, and set aside.

Add chipotles, tomatoes, star anise, and cinnamon, and simmer until liquid is reduced by half, about 15 minutes. Shred chicken, and return to sauce. Simmer gently until most of the liquid has been absorbed, 5 to 10 minutes. Remove cinnamon stick and star anise before using.