Sauté green onions in oil in a Dutch oven over medium heat 1 minute. Add green chiles and next 3 ingredients; cook 2 minutes, stirring constantly. Stir in beans and broth; bring to a boil. Reduce heat, and simmer, stirring constantly, 5 to 7 minutes or until mixture is thickened. Stir in turkey. Pour into a greased 13" x 9" baking dish.
Combine 1 cup flour and baking powder in a small bowl. Add cheese, milk, and egg, stirring just until blended. Spread biscuit topping over filling, leaving a 1" border around edge.
Bake, uncovered, at 375° for 30 minutes or until topping is golden and pot pie is bubbly.