Caraway and sesame rye crackers

Method

1. Heat the oven to 140°C/120°C fan/gas 1 and line the baking sheets. Mix the  rye flour, baking powder, salt and sugar in a bowl. Beat together the egg and water, then add to the dry mixture and combine.
2. Knead the dough on a lightly floured surface, then roll it out as thinly as you can (aim for 2mm). Scatter over the caraway and sesame seeds, then roll again. Cut the dough into large shards, then use a metal spatula to carefully lift the shards onto the baking sheets. Roll again briefly to flatten and brush with a little oil.
3. Bake for 45 minutes, turning halfway, until crisp and golden. Transfer to a wire rack to cool completely.