Combine diced chicken with flour, cornstarch, salt, pepper, and water in a bowl until a tacky coating forms.
Heat frying oil in a wok or deep skillet over medium heat, then fry the chicken pieces for 10 to 12 minutes, turning as needed, until they are golden and crisp. Transfer to a plate and set aside.
Add a small amount of oil to the same pan if necessary. Sauté the shallot, garlic, and minced ginger for about 30 seconds to 1 minute until aromatic.
Stir in the frozen peas and carrots, cooking until warmed through.
Introduce the day-old rice to the pan, breaking apart any lumps. Drizzle in sesame oil and soy sauce, stirring until the rice is evenly coated. Push the rice to one side of the pan, crack in the eggs, and scramble them.
Once cooked, fold the eggs into the rice mixture.
In a separate bowl, mix together mayonnaise, garlic chili paste, spicy honey, sriracha, salt, and pepper. Coat the fried chicken in the prepared sauce thoroughly.
Spoon the fried rice onto serving plates, placing the Bang Bang chicken on top. Garnish with green onions and a drizzle of spicy honey or sriracha if desired. Serve immediately.