Combine the orange marmalade, scallions, chicken broth, Cajun seasoning, hot sauce, and remaining 1/2 teaspoon soy sauce in a small saucepan over medium-high heat. Bring to a boil, stirring occasionally; reduce the heat to medium low, and simmer stirring occasionally, until thickened and reduced to 1 cup, about 15 minutes. Remove 1/4 cup of the sauce for basting; reserve the remaining sauce for serving.