Zucchini Tart with Cream Cheese, Mozzarella, and Thyme Recipe

Ingredients (12)

• 1 1/4 pounds (570g) zucchini (about 2 medium zucchini), cut into 1/8-inch-thick rounds
• 1 1/4 teaspoons Diamond Crystal kosher salt; for table salt, use half as much by volume
• All-purpose flour, for dusting
• 2 sheets frozen puff pastry (1 full box), thawed until pliable but cool
• 4 ounces (115g) full-fat cream cheese, softened
• 1 tablespoon (15g) Dijon mustard 
• 1 1/2 teaspoons chopped fresh thyme leaves, plus additional leaves for garnish
• 1 medium garlic clove, minced (optional)
• 4 ounces (115g) shredded low-moisture mozzarella (about 1 cup)
• 1 tablespoon (15ml) extra-virgin olive oil
• Freshly ground black pepper
• Finely grated zest of 1 lemon