Spray an 8-inch square pan with nonstick cooking spray. Into prepared baking
pan, place all filling ingredients. Toss until well mixed; set aside.
To prepare tamale topping, in medium bowl, place flour, cornmeal, baking
powder, baking soda, and salt; stir until evenly mixed.
In a small bowl, beat yogurt, egg and margarine. Add to dry ingredients
and stir just until dry ingredients are moistened. Spoon mixture evenly on top
of vegetable filling. If desired, sprinkle evenly with chives.
Bake for 35-40 minutes, until filling is hot and bubbly, topping is lightly
browned and a wooden pick inserted in center of topping comes clean.