
A stunning rustic tart featuring a smoky aubergine and tomato base topped with vibrant concentric circles of summer vegetables. The homemade pastry is enriched with sharp cheddar and aromatic thyme, providing a perfectly flaky and savory crust.
Prepare the pastry base by mixing the flour, half of the polenta, grated cheddar, and most of the thyme leaves in a large bowl with a pinch of salt. Using a coarse grater, grate the frozen butter directly into the flour mixture, stirring with a knife to ensure the butter pieces stay separate and coated. Quickly stir in 125ml of ice-cold water and gently bring the dough together with your hands. Wrap in parchment paper and chill in the fridge for at least 30 minutes.
While the dough chills, prepare the tomatoes. Slice them into rounds roughly the thickness of a coin. Set aside the best-looking slices (about half) to use for the topping, and roughly chop the remaining slices into chunks for the filling.
Char the aubergine to develop a smoky flavor. Pierce the skin a few times with a knife, then grill on high heat or hold over a gas flame with tongs for 8-10 minutes, turning frequently until the skin is blackened and the flesh feels soft and collapsing. Set aside to cool.
Heat 1 tablespoon of olive oil in a pan over medium-low heat. Sauté the sliced red onions with a pinch of salt for about 10 minutes until they begin to caramelize. Meanwhile, scrape the charred skin off the cooled aubergine and roughly chop the smoky flesh.
Add the crushed garlic and chopped aubergine to the onions. Cook for 5 minutes until any excess moisture has evaporated. Stir in the chopped tomatoes and caster sugar, season well, and simmer for 5-10 minutes until the mixture is thick and jammy. Allow the filling to cool completely in the fridge.
Slice the courgettes into rounds of similar thickness to the tomatoes. Place them in a bowl, toss with a generous pinch of salt, and let them sit for 10 minutes to draw out excess water.
Preheat your oven to 200°C (180°C fan/gas 6) and place a large baking tray or a 30cm skillet inside to heat up. On a floured sheet of baking parchment, roll the chilled pastry out into a circle approximately 35cm wide.
Drain the liquid from the courgettes and pat them very dry with kitchen paper. Sprinkle the remaining polenta over the center of the pastry, then spread the chilled tomato and aubergine filling over the top, leaving a 3cm border around the edges.
Arrange the reserved tomato and courgette slices in overlapping concentric circles over the filling. Brush the vegetables with the remaining oil, season, and sprinkle with Parmesan. Fold the pastry edges inward over the vegetables, pressing gently to seal, and brush the crust with the beaten egg yolk.
Carefully slide the tart (still on the parchment) onto the hot baking tray or into the skillet. Bake for 45 minutes until the pastry is deep golden and crisp. Scatter with the remaining thyme leaves and serve warm or at room temperature.
For the flakiest pastry, ensure the butter is truly frozen and handle the dough as little as possible to keep it cold. Salting and drying the courgettes is a vital step to prevent the tart from becoming soggy during baking. You can prepare the vegetable filling up to 24 hours in advance to make assembly quicker.




