Mix bread flour & wholewheat flour. Whisk to mix it well. Add sugar, salt, sourdough starter and flaxseed. Knead it with low speed until mix it well. Add water slowly, still use low speed to knead it. Add olive oil slowly and knead it for 10 minutes.

Form into a ball, cover for 1 hour. Sprinkle a little flour on the dough surface. Remove the dough on the surface. Divide the dough into 4 equal parts. Form into a small ball, cover for 20 minutes.

Sprinkle a little flour on the dough. Flatten a small ball.

Preheat the oven at 250 degrees celsius, bake for 5- 8 minutes.