Put a medium-sized pan on low-medium flame, add Olive Oil, and let it warm. Then, add Garlic, stir the mixture till the Garlic is softened (Golden-Brown) and releases a pleasant smell.
Then, add Chipotle Pepper and Tomatoes with Green Chilies. Stir till they are mixed well. Reduce the flame and let the mixture cook for about 10-15 minutes, occasionally stirring, so no food lumps are made.
Keep the mixture aside to cool a little bit, then carefully add the mixture to a blender.
Then, add Peanut Butter, Chili Powder, Chicken Broth, Pepper, Salt, and Cinnamon. Blend the mixture until it is well combined.
After properly blending it, return the mixture to the pan over medium flame. Let the mixture be cooked for 15 minutes. Stir occasionally.
Now add Chocolate and whisk it till it is melted.
Put the Chicken in the sauce and mix it properly till it is fully coated in the Sauce. Enjoy your meal!