Coat chicken with 1/4 cup Bisquick mix. In 4-quart Dutch oven, heat oil over medium heat. Add chicken; cook 10 to 12 minutes, stirring occasionally, until no longer pink in center.
Stir in pumpkin, pumpkin pie spice, potatoes, onion, tomatoes and broth. Heat to boiling; reduce heat. Cover; simmer 5 minutes, stirring occasionally. Meanwhile, in medium bowl, stir dumpling ingredients until soft dough forms.
Drop dough by 6 spoonfuls onto stew mixture. Cook uncovered 10 minutes. Cover; cook about 10 minutes longer or until vegetables are tender. Sprinkle with parsley or additional pumpkin pie spice.