01 - Preheat oven to 400°F. Line a baking tray with parchment paper.
02 - Arrange zucchini, bell peppers, red onion, and cherry tomatoes on tray. Drizzle with olive oil, sprinkle with herbes de Provence, salt, and pepper. Toss to coat evenly.
03 - Roast vegetables for 20–25 minutes, turning halfway through, until lightly caramelized. Allow to cool slightly.
04 - Reduce oven temperature to 350°F. Roll out puff pastry and fit into a 9-inch tart pan. Trim excess and prick base with a fork.
05 - In a bowl, whisk crème fraîche, eggs, grated cheese, fresh basil, salt, and pepper until combined.
06 - Spread filling over pastry base evenly. Arrange roasted vegetables on top in a uniform layer.
07 - Bake for 25–30 minutes until filling is set and pastry is golden brown.
08 - Let tart cool for 10 minutes before slicing. Garnish with additional fresh basil if desired.