01 - Preheat oven to 375°F.
02 - Place pie crust in a 9-inch tart pan. Prick base with a fork, line with parchment paper, and fill with pie weights or dried beans. Blind bake for 10 minutes. Remove weights and bake an additional 5 minutes. Set aside.
03 - Heat olive oil in skillet over medium heat. Sauté onion and bell pepper until softened, about 3 minutes. Add zucchini and cook for 4 minutes. Stir in spinach and cook until wilted, about 1 minute. Remove from heat and cool slightly.
04 - In a large bowl, whisk together eggs, milk, heavy cream, salt, black pepper, and nutmeg until fully combined.
05 - Spread sautéed vegetables evenly over pre-baked crust. Sprinkle cherry tomatoes and grated cheese on top.
06 - Pour egg mixture evenly over vegetables and cheese in crust.
07 - Bake in preheated oven for 30 to 35 minutes until center is set and top is golden brown.
08 - Allow quiche to cool for 10 minutes before slicing and serving.