Prepare the Chicken:
Pat chicken pieces dry thoroughly with paper towels.
Season with salt, black pepper, and garlic powder.
Set up bowls with beaten egg and cornstarch.
Coat and Cook the Chicken:
Dip each piece into egg, then cornstarch, pressing lightly to adhere.
Heat about 2 inches of oil in a skillet over medium-high heat.
Fry chicken in batches for 3–4 minutes per side until golden brown and cooked through (165°F internal temperature).
Transfer to a paper towel-lined plate to drain.
Make the Bang Bang Sauce:
In a small bowl, whisk mayonnaise, sweet chili sauce, sriracha, and rice vinegar.
Adjust seasoning to taste.
Prepare the Vegetables:
Slice cucumber, chop green onions, and set out shredded carrots and cabbage.
Assemble the Bowls:
Place a scoop of warm rice in each bowl.
Arrange vegetables around the rice.
Top with crispy chicken.
Drizzle generously with Bang Bang sauce.
Sprinkle with green onions and toasted sesame seeds.