Use Up Summer Produce With Tomato Zucchini Basil Galette

Ingredients

• 1 ½ cups (190g) all-purpose flour, plus more for dusting
• ½ teaspoon kosher salt (3g)
• ½ cup (1 stick/113g) unsalted butter, very cold, cut into ½-inch cubes
• ¼ cup (60ml) ice water
• 1 large egg, beaten (for egg wash)
• 1 tablespoon milk or cream (for egg wash)
• 1 tablespoon olive oil (15ml)
• 1 small onion, thinly sliced (approx 75g)
• 2 cloves garlic, minced (approx 6g)
• 2 medium zucchini, thinly sliced (approx 300g)
• 1 ½ pounds (680g) ripe tomatoes, sliced
• ½ cup (50g) grated Parmesan cheese
• ¼ cup (15g) fresh basil leaves, roughly chopped
• 1 tablespoon balsamic glaze (optional, for drizzling)
• Salt and freshly ground black pepper to taste