Hearty Chicken Pot Pie

Ingredients

• 2-½ cups all purpose flour
• 2 tablespoons sugar
• ½ teaspoon baking powder
• ½ teaspoon salt
• ½ cup shortening
• ¾ cup buttermilk
• ¼ cup warm water (100°–110°F)
• 1 (2-¼ tsp.) envelope Fleischmann's ® Active Dry Yeast
• 3 tablespoons butter, divided
• 1 medium onion, diced
• 2 cups cooked, diced chicken
• 1 package (16 ounces) frozen mixed vegetables
• 1 cup chicken broth
• 1 teaspoon garlic salt
• ½ teaspoon black medium grind pepper
• 1 cup cold milk
• 3 tablespoons Argo ® Corn Starch