01 - Preheat your oven to 400°F and line a baking tray with parchment paper.
02 - Roll out the puff pastry onto the prepared tray. With a sharp knife, lightly score a ½-inch border around the edges (do not cut through), and prick the center with a fork.
03 - In a bowl, mix crème fraîche, goat cheese, egg, Parmesan, lemon zest, herbs, salt, and pepper until smooth.
04 - Spread the cheese mixture evenly over the center of the pastry, keeping the border clear.
05 - Arrange zucchini, asparagus, red onion, and cherry tomatoes decoratively over the cheese base. Drizzle with olive oil and season with salt and pepper.
06 - Bake for 25–30 minutes, or until the pastry is golden and crisp and the vegetables are tender.
07 - In the last 5 minutes, scatter spinach leaves over the tart so they wilt slightly.
08 - Remove from the oven, let cool for 5 minutes, then cut into portions and serve warm.