This zucchini pie is delicious served with fresh tomato or a tomato salad.

Set the oven rack in lower third of the oven. Preheat the oven at 375°F (190 ° C) .
In a large skillet, over medium heat, cookthe zucchini and onions in the butter or oil for about 10 Minutes. Add garlic and cook 1 minute. Cool at room temperature.
Beat the eggs in a large bowl. Blend in parsley, salt, pepper, basil, oregano and cheese. Mix in cooled vegetables.
With the back of a spoon, spread the mustard on the bottom of the pie shell, pour the vegetable-cheese mixture in the pie shell and cook in the oven 30 Minutes until the pie is crust is golden and the filling is set in the center.