Lemon Tart

For 22 cm pie dish (preferably with a loose bottom) Pastry dough: 1/2 dl water 2 tsp flea seed shells (use 1 teaspoon if you use the yellow FiberHUSK) 100 g butter (can be replaced with coconut oil or Naturli Spreadable Block) 60 g sorghum flour (or rice flour) 40 g millet flour (or corn flour) 40 g almond flour (or cornstarch, chufa or oat flour) 40 [...]