Prepare the batter by combining all the ingredients together in a bowl until you have a smooth, paint-like batter consistency (add more water if too thick). Add in the chicken and gently mix to ensure the chicken pieces are well coated.
Deep fry the coated chicken pieces (~330-340 F) for about 5-7 minutes, or until fully cooked through and golden. Double fry (optional, but highly recommended): Turn the heat to high, and fry the chicken for a second time (~375 F) for 30-60 seconds until golden brown and crispy. Set aside to cool on a wire rack.
Mix together all the ingredients for the sesame sauce. Pour the sauce into a large pan or wok and bring to a boil for about 1-2 minutes, or until slightly thickened.
Once thickened, add in the fried chicken pieces and sesame seeds. Gently toss until the chicken is fully coated in the sesame sauce and seeds.
Serve immediately. Top with green onions. Enjoy!
