- Mix the eggs yolks with 2 tbsp cold water stir with a fork until well combine.
- Place the flour into the bowl of a food processor, followed by the cold butter and the salt. Turn the processor on and pulse several times until the mixture resembles fine breadcrumbs.
- Add the egg yolk/water mixture and pulse again. Be careful not to overwork the pastry. Stop pulsing when the mixture has the consistency of chunky breadcrumbs.
- Turn the pastry out onto a clean, floured work surface and, with floured hands, bring together to make a dough, but don't knead.
- Shape into a flattened ball, wrap in cling film and refrigerate for about 30 minutes. You can keep the pastry at this stage for 2-3 days if not using it immediately.
- Remove the pastry from the fridge. On a clean, floured work surface, roll it out with a floured rolling pin until it's slightly larger than the flan ring. Using the rolling pin, lift the pastry and lay it over the flan ring.
- With your fingers, lightly press the pastry into the sides of the ring. Run a rolling pin over the top of the ring and pull away the excess pastry at the edges. Using your fingers, gently press the pastry up to slightly build up the height of the pastry at the edges.
Assemble the apple tart:
- Peel and core the apple then cut in to half and slice it into the thickness you like. I slice it quite thinly.
- Arrange the apples decoratively on the pastry shell, overlapping them. Sprinkle the sugar on top of the apples, top with butter cubes and bake in the middle of the 180'C preheated oven for 45 minutes or until the crust is cooked through and the apples are golden.
- Brush with the heated apricot jam while the tart is still hot.