Preheat oven to 375°F and line a 9” by 13” pan with aluminum foil. Arrange the chicken pieces in the pan so that they are not touching.
In a small (1-quart) saucepan, combine green onion, soy sauce, chili sauce, ginger, and garlic. Brush chicken with 1/4 cup of the mixture.
Bake the chicken for 40 minutes.
While the chicken is baking, add the plum jam to the mixture in the saucepan and whisk to combine over low heat, until thoroughly combined.
Remove chicken from oven and baste with about half of the jam mixture. Return to oven and bake for another 15-20 minutes, until chicken is cooked through.
Return the remaining jam mixture to the stove, and heat over medium-low flame until it just begins to boil. Spoon over chicken before serving.