Take a deep bowl and pour dry ingredients : oatmeal flour, brans, baking soda, oatmeal and then mix it well.
Cut prunes and walnuts into small pieces and and put into bowl to dry the ingredients. Add honey and add 2-3 tablespoons of water and start mixing if needed add more. Dough should have consistency of thick cream.
Preheat oven to 170 C. Take flat baking tray and cover with foil. Use tea spoon to form cookies, make sure you place them around 5 cm from each other. Bake for 10-15 minutes.