1Pat chicken cubes completely dry using paper towels to ensure maximum crispiness during frying.
2Whisk together flour and cornstarch in a shallow bowl until evenly combined. Beat eggs in a separate shallow bowl and set aside.
3Dredge each chicken piece in the flour-cornstarch mixture, coating all sides thoroughly. Dip into beaten eggs, allowing excess to drip off. Return to flour mixture and coat again, pressing gently to adhere. Place coated pieces on a plate and let rest for 10 minutes for better coating adhesion.
4Heat vegetable oil in a deep, heavy-bottomed pot or wok to 365°F, using a cooking thermometer for accuracy. Working in small batches to avoid crowding, carefully lower chicken pieces into hot oil. Fry until deep golden brown and cooked through, about 4-5 minutes per batch. Transfer to a wire rack or paper towel-lined plate. Maintain oil temperature between batches.
5While chicken fries, prepare the honey sauce. Combine chicken broth, soy sauce, and rice vinegar in a medium saucepan over medium-high heat. Add minced garlic and ginger, stirring constantly until fragrant, about 1 minute. Stir in honey and red pepper flakes, reducing heat to medium. Simmer until sauce thickens slightly and reduces by about one-third, approximately 5-7 minutes. Remove from heat and stir in sesame oil.
6Transfer crispy chicken to a large mixing bowl. Pour warm honey sauce over chicken and toss gently but thoroughly to coat every piece evenly.
7Arrange glazed chicken on a serving platter. Garnish generously with sliced scallions and toasted sesame seeds. Serve immediately while coating is still crispy.