Step 1

To make the pastry, put the flour in the bowl of a food processor with ¼ tsp of fine sea salt and the butter, and pulse until the mixture resembles breadcrumbs. Add the egg yolks, then the remaining ingredients and pulse until a coarse breadcrumb texture. Add 1 tbsp of cold water and pulse again until it forms a ball. Wrap and chill for 30 mins.

Step 2

Heat the oven to 200C/180C fan/gas Roll out the pastry on a lightly floured work surface until 4-5mm thick. Use to line a 23cm loose-bottomed tart tin. Trim the pastry edges and prick the base with a fork a few times. Lay a scrunched-up piece of baking paper over the middle and fill with baking beans or uncooked rice. Bake for 15 mins, then remove the paper and bake for a further 10 mins until pale and golden. Cool.

Step 3

Meanwhile, put the tomato slices on a baking sheet in a single layer and scatter over the sea salt flakes. Leave at room temperature while the pastry blind bakes.

Step 4

Heat the oven to 170C/150C fan/gas Mix the crème fraîche, thyme and garlic in a small bowl with plenty of seasoning, and pat the tomato slices dry. Scatter the tart base with the breadcrumbs or semolina to absorb any excess liquid. Evenly arrange a layer of tomatoes. Spoon the crème fraîche mixture on top and smooth out to the sides. Scatter over the cheese. Add a second layer of tomatoes in a spiral, overlapping slightly, using the smallest slices in the middle. Drizzle with a little olive oil and bake for 1 hr until the tomatoes have wilted and softened, their flavour concentrated and are golden tinged. Serve warm or cool to room temperature. Scatter with more manchego, the thyme leaves and a pinch of paprika to serve. The tart will keep for three days.