1 (9 inch) unbaked deep-dish pie crust
1 tablespoon olive oil
½ cup sliced onion
½ cup chopped green capsicum
½ cup mushrooms, sliced
½ cup chopped zucchini
1 large tomato, sliced
2 tablespoons all-purpose flour
2 teaspoons dried basil
3 large eggs eggs, beaten
½ cup milk
½ teaspoon salt
¼ teaspoon ground black pepper
1 ½ cups shredded cheese, divided