Pre heat oven to 375 degrees.

On a floured surface, roll out pie dough into an 11u0022 circle. Press into a 9u0022 pie plate. Chill for 30 minutes. Prick the bottom and sides with a fork. Line with foil and dried beans or pie weights and bake for 10 minutes.

Remove the foil and pie weights and bake an addtional 5-7 minutes until the crust is golden brown. Remove from oven and set aside.

Reduce heat in oven to 350 degrees.

Heat oil in a large skillet. Pat zucchini dry and sauté until golden brown. Set aside in a bowl. Add butter to pan. Sauté mushrooms until they have a browned edge. Add in peppers, spinach, green onions and thyme. Cook an additional 5 minutes on medium low heat. Set all vegetables aside and allow to cool slightly.

In a bowl combine, eggs, half u0026 half, salt, garlic salt, white pepper and corn starch. Gently stir in vegetables and mix well. Add in cheese.

Pour the quiche filing into the baked pie shell. Bake until set approximately 25-30 minutes.