Preheat oven to 375 degrees. Spray muffin pan with nonstick spray. Place 2 overlapping wonton wrappers in muffin pan, so corners are all facing opposite directions. Set aside.
In a large mixing bowl, combine filling ingredients. Mix until fully incorporated.
Using a 2 tbsp cookie scooper (or by the spoonful if you don't have one), add about 2 tbsp of filling to each muffin tin. If leftovers remain, disperse evenly amongst cups.
Bake for 20 minutes, or until chicken is fully cooked to 165 degrees Fahrenheit and wonton wrappers are golden brown.
Allow cups to sit in muffin tin for about 10 minutes before removing, topping, and serving.
Top finished banh mi cups with a drizzle of hoisin, and a sprinkle of green onion and cilantro. Enjoy!