Marinate the chicken pieces in orange juice for 30 minutes in the fridge.
Ensure the pieces are fully covered.
Coat marinated chicken in cornstarch, shaking off any excess.
This creates a crispier texture when cooked.
Heat canola oil in a skillet over medium-high heat.
Add the chicken and cook until both sides are golden brown.
Remove excess oil from the skillet, leaving about 1 tablespoon.
Sauté garlic and ginger for about a minute until they are fragrant.
Add soy sauce, sugar, red pepper flakes, and rice vinegar to the skillet.
Stir well and simmer until the sauce thickens slightly.