

To make filling: Preheat the oven to 400F. Coat a pie plate (or any baking dish you like) generously with nonstick cooking spray.
Heat olive oil in a large pan over medium heat.
Add onion, carrots, celery, and green beans, and saut for about 10 minutes, until tender.
Add garlic and stir constantly for 30 seconds.
Sprinkle the flour into the pan and stir until it coats the vegetables, about 30 seconds. Slowly stir in 2 cups of hTo make crust: In a large bowl, whisk the cornmeal, flour, baking powder, sugar and salt. Stir milk, egg and canola oil until well combined in a separate bowl. Stir wet ingredients into dry ingredients. Spoon the batter evenly over the filling.
Bake until the top is golden brown, about 22 to 25 minutes.
Let cool for at least 15 minutes before serving.