- Sauté onion and sage in hot oil in large skillet over medium-high heat 2 minutes.
- Sprinkle in flour; cook and stir until bubbly. Add chicken broth and soy sauce; cook, stirring, 1 minute. Gradually stir in soymilk. Add vegetables and chicken; cook and stir until mixture is hot.
- Pour into 1-1/2-quart round casserole dish. Top with pie crust; fold under excess dough and flute edges, pressing dough onto dish. With sharp knife, make six 3-inch long slits in crust.
- Bake in preheated 425°F oven 25 minutes, or until crust is golden brown. (If edges of crust start to brown too quickly after 15 minutes, cover with strips of foil.)
- Let stand 5 minutes before serving.