Preheat oven to 425 degree F.
Sprinkle the cheese over the bottom of the pie shell, then evenly distribute the onion, broccoli, and mushroom over the cheese layer. Mix the eggs and the spices together in a bowl. Add the milk and half-and-half and mix well. Pour over contents in the pie shell.
Cut the cherry tomatoes in halves and place, cut side up, in a ring on top of the mixture. Sprinkle the 1 tablespoon of Romano over top. Bake for 15 minutes. Turn oven down to 300 degrees F and bake an additional 45 to 55 minutes or until cake tester inserted in middle comes out clean.
Blend together with pastry blender until crumbly (like coarse cornmeal). Add cold water, 1 tablespoon at a time, mixing with a fork until mixture will hold together. Handle as little possible. Wrap in plastic wrap in a "patty" and chill for at least an hour. Roll out between Saran Wrap with very little flour. Place carefully in a pie plate, being careful not to stretch dough. Trim the edges.
This recipe was provided by a chef, restaurant or culinary professional. It has not been tested for home use.