Pre-heat oven to 180°C / 160°C fan assisted / gas mark 4 / 350°F.
Whisk all the dry ingredients together in a large mixing bowl.
Stir in the olive oil and mix in until evenly distributed throughout the dry ingredients.
Slowly pour in the water, stirring in until the mixture is hydrated and you can bring the dough together with your hands. It’s easier to tip out onto a clean work surface as the dough really comes together then you can shape the dough into a thick rectangular shape.
Cover the dough and allow to rest for 10 minutes just to allow the flours to hydrate a little.
Place the dough rectangle on a piece of parchment a bit larger than the size you will be rolling out the dough to. Roll the dough out using a rolling pin to 40cm x 25cm, 3mm depth. Trim the edges to neaten up.
Score the dough with a sharp knife which will help keep the dough flat and also help with cutting after baking. Score into 25 crispbreads. Each crispbread should be sized 8cm x 5cm which means 5 scores lengthways (8cm each) and 5 scores widthways (5cm each).
Sprinkle with a few extra seeds and press them in just slightly with the rolling pin for a prettier finish.
Carefully transfer the baking parchment onto a baking sheet and place in the oven. Bake for 30 minutes.
Immediately remove the crispbreads off the baking parchment and tray onto a cooling rack. Let the crispbreads cool fully before separating the crispbreads and serving.