Preheat oven to 425 degrees. Add artichoke marinade along with the chopped onion, bell peppers, and mushrooms. Sauté veggies for 2 - 3 min. Add another tablespoon of the artichoke marinade to the skillet and stir in the chopped zucchini.
Layer the cooked veggies on top of the prepared pie crust, then top with the drained artichoke hearts. Sprinkle evenly with Monterey Jack cheese. Whisk together the eggs, half and half, salt, and pepper; pour over cheese. Sprinkle with fresh oregano. Bake for 15 minutes. Reduce the oven temperature to 350 degrees and continue baking 20 min.