Cut chicken into 1-inch pieces. Place in large nonstick skillet and stir in gravy, frozen vegetables and sliced white scallions. Bring to a boil, stirring a few times.
Mix buttermilk baking mix, water and scallion greens together with a fork until just blended into a dough. Reduce heat under skillet and drop 8 large spoonfuls dough on chicken mixture.
Simmer uncovered for 10 minutes. Cover and simmer 10 minutes more, until chicken is no longer pink in center. Makes 4-6 servings with 472 calories and 12 grams of fat. Enjoy!