
This asparagus, feta and dill quiche has a crisp cheese pastry and a creamy, savory filling with fresh spring flavor. It is elegant enough for brunch or lunch with guests, yet practical to make ahead and serve at room temperature.
Warm the vegetable oil in a frying pan over medium heat. Add the onion and cook for about 5 minutes, then stir in the garlic and cook for another 5 minutes, until the onion is soft and translucent but not browned. Remove from the heat and let cool.
Bring a large pan of salted water to a boil. Add the asparagus and cook for 3 minutes, then drain and transfer immediately to a bowl of cold water. Drain again, reserve 8 whole spears for the top, and cut the remaining asparagus into 3 cm pieces.
Make the pastry by mixing the flour and grated hard cheese in a bowl. Rub in the cold cubed butter with your fingertips until the mixture looks like fine breadcrumbs. Add cold water 1 tbsp at a time, using just enough to bring the dough together. Wrap and freeze for 5 minutes to firm slightly.
Roll the pastry on a lightly floured surface until large enough to line a deep 23 cm flan tin. Lift it into the tin, press it gently into the edges, and trim so the pastry sits about 2 cm above the rim. Prick the base with a fork, then chill in the freezer for 15 minutes. Heat the oven to 200°C/180°C fan/gas 6.
Line the chilled pastry case with crumpled baking parchment and fill with baking beans. Bake for 15 minutes, then remove the beans and parchment and bake for 5 minutes more. Set aside to cool slightly.
In a bowl, gently whisk together the double cream, crème fraîche, yogurt and eggs until just combined. Avoid beating in too much air. Stir in the cooled onion mixture, white pepper and smoked paprika, then fold in the dill, most of the feta and the chopped asparagus.
Place the pastry case on a baking tray. Pour in the filling and spread the asparagus and feta evenly. Arrange the reserved whole asparagus spears on top and scatter over the remaining feta.
Put the quiche in the oven and immediately reduce the temperature to 180°C/160°C fan/gas 4. Bake for 35-40 minutes, until the filling is set around the edges with a slight wobble in the center. Cool before slicing so the custard sets cleanly.
Do not overmix the custard, as too many air bubbles can make the texture less silky. If asparagus is out of season, use tenderstem broccoli or leeks instead. The quiche can be baked a day ahead, cooled, refrigerated, and served chilled or gently rewarmed.
