Mix the breadcrumbs, parmesan, and spices together in a large bowl before adding the chicken, egg, and buffalo sauce. Stir until everything is evenly combined and divide the mixture into 12 50g meatballs and set aside.
Mix the sauce ingredients and set aside.
Heat a large skillet over medium heat with the olive oil. Carefully place the meatballs in the skillet and cook for 2-3 minutes until the bottoms are golden brown. Flip the meatballs and cook for an additional 6-8 minutes, turning the meatballs every 1-2 minutes to brown on all sides. (8-10 minutes total.)
Add the sauce to the pan and gently stir/toss the meatballs in the sauce as it reduces. After 2-3 minutes, the sauce should be thick and sticky, and the meatballs should be fully cooked to an internal temperature of 165ºF.
Remove from the heat and top the meatballs with toasted sesame seeds and green onion.