Using a mandoline or sharp knife, cut the courgettes into very thin slices. Place in a bowl with 3 tablespoons of extra virgin olive oil, lemon juice, and salt. Leave to marinate for 30 minutes while you prepare the rest of the recipe.
250 g courgettes, 3 Tbsp extra virgin olive oil, juice of 1 lemon, salt
Preheat the oven to 200°C/400°F.
Layout the puff pastry on a baking tray. With a sharp knife, score the pastry lightly to create a border of about 1cm around the edges.
1 puff pastry
Prick the middle of the pastry all over with a fork. Brush with a bit of milk.
1 Tbsp milk
Bake in the oven until golden, about 20 to 25 minutes.
In the meantime, make the whipped feta: Place the feta, yoghurt, garlic, and lemon zest in the bowl of a food processor. Blend until smooth. Set aside.
200 g feta cheese, 125 g Greek yoghurt, 1 large garlic clove, ½ lemon zest
Make pesto: Place the basil, mint, walnuts, and garlic in the bowl of a food processor. Blend until smooth.
20 g fresh basil , 10 g fresh mint , 35 g walnuts , 1 garlic clove
Transfer the mixture to bowl. Mix in the parmesan cheese, lemon juice, and olive oil until you have your desired consistency. Season with a bit of salt. Set aside.
6 to 8 Tbsp extra virgin olive oil, 2 Tbsp lemon juice, salt, 25 g freshly grated parmesan
When the puff pastry is cooked, flatten the middle with a spatula.
Spread the whipped feta evenly on top of the pastry, avoiding the edges.
Drain the marinated courgettes, and arrange on top of the feta.
Drizzle some pesto on top and serve.