Put the flour in a large bowl. Add the salt, baking powder, anise seeds, honey and butter. Mix thoroughly, then start slowly adding 175ml/6fl oz water, stirring until you have a soft dough. Don’t worry if it’s a bit sticky, it will be fine once you start rolling.
Generously flour a work surface and turn out the dough. Roll the dough out thinly.
Cut out 20cm/8in rounds – you should get 6 - 8 rounds. Cut a small hole in the middle of the rounds.
Place the rounds on 3 baking trays and prick the crispbreads all over with a fork.
For the topping, whisk the egg white with 1 tablespoon water and brush over the crispbreads. Sprinkle with your choice of seeds and press down lightly.
Bake for 12-15 minutes. Remove and leave to cool on a wirerack.
If you fancy making bigger crispbreads then double the quantities and use a dinner plate to cut the crispbreads out.