1. Preheat oven to 425°F. Pierce pie crust with a fork. Bake crust until bottom is golden brown, pressing with back of fork if bubbles form, about 12-15 minutes. Cool 5 minutes.
2. Reduce oven temperature to 400°F. Sprinkle mozzarella over bottom of crust. In a medium bowl combine 6 tablespoons Parmesan, tomatoes, goat cheese, basil, green onions, and oregano. Add tomato mixture to pie crust. Top with zucchini rounds in concentric circles to cover top of tart. Whisk eggs, half and half, salt, and pepper in medium bowl. Pour mixture into tart. Sprinkle with remaining 1/4 cup Parmesan.
3. Bake tart until custard is set and crust is golden brown, about 35 minutes. Serve warm or at room temperature.
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