Creating Dragon Chicken is straightforward if you follow these steps:

1. Marinate the Chicken: In a bowl, combine chicken pieces with soy sauce, vinegar, corn starch, salt, and pepper. Allow it to marinate for at least 10 minutes.
2. Heat Oil: In a large pan or wok, heat vegetable oil over medium-high heat.
3. Cook Chicken: Add the marinated chicken to the pan. Stir-fry until the chicken is golden and cooked through (about 5-7 minutes). Remove and set aside.
4. Sauté Aromatics: In the same pan, add garlic, ginger, and green chilies. Sauté for about 1-2 minutes until fragrant.
5. Add Vegetables: Toss in the sliced bell peppers and onion. Stir-fry for another 3-4 minutes. Vegetables should be tender yet crisp.
6. Combine Chicken and Veggies: Return the cooked chicken to the pan and mix well with the vegetables.
7. Add Sugar: For a hint of sweetness, sprinkle sugar and more soy sauce if desired. Stir everything together for 1-2 minutes.
8. Garnish: Turn off the heat and garnish with chopped spring onions.
9. Serve Hot: Transfer to a serving dish.

These simple steps will guide you to create this incredible dish effortlessly!