Step 1

For the base, preheat the oven to 200C/180C Fan/Gas 6 and line two flat baking trays with non-stick baking parchment.

Step 2

Unroll the pastry and cut into 8 equal-sized rectangles. In a cup, whisk the egg and milk together and brush over both sides of each rectangle. Space the pastry out on the baking trays.

Step 3

To make a crust, use a sharp knife to draw a border 1cm/½in from the edge all the way round each rectangle. Then make a criss-cross pattern in the middle. Repeat with the other rectangles.

Step 4

Bake for ten minutes, or until lightly golden-brown and puffed up. Leave to cool before making the crème fraîche filling and adding your choice of topping(s).

Step 5

For the crème fraîche filling, mix all the ingredients in a small bowl and season with salt and freshly ground black pepper.

Step 6

For the smoked trout, dill and horseradish topping, mix the spring onions, dill, cream cheese, trout and horseradish and stir in half the crème fraîche filling. Spread over the middle of 4 cooked pastry rectangles and bake for 10–12 minutes, or until golden-brown.

Step 7

For the Brie, bacon and cranberry topping, divide and spread half the crème fraîche filling on 4 cooked pastry rectangles. Top with the Brie and then bacon. Bake for 12–15 minutes, or until golden-brown. Serve hot with a spoonful of cranberry sauce and a few leaves of rocket on top.

Step 8

For the ricotta, anchovy and spinach with chilli, squeeze out any excess water from the spinach and roughly chop. Mix the chopped spinach with half the crème fraîche filling and add the anchovies, ricotta and chilli flakes. Divide among 4 cooked pastry rectangles and spread. Bake for 12–15 minutes.

Step 9

For the chestnut, pesto and cheddar with onion chutney topping, in a bowl combine half the crème fraîche filling with the cheddar, pesto and chestnuts. Divide among 4 cooked pastry rectangles and spread. Bake for 12–15 minutes. Serve hot with a spoonful of chutney.