Chop all the herbs finely. Combine them together in a bowl.
Place eggs in a large bowl. Add baking powder, salt, and pepper. Mix well. Add herbs, walnuts, and barberries to the eggs.
Warm-up a non-stick pan with some oil. Place the egg and herbs mixture in, smooth the surface on and press down gently
Cover and cook for about 20 minutes on medium-low. When the top looks cooked and firm to touch, the edges will be sizzling. Remove from the heat.
Use a sharp knife to cut it into equal wedges. Kuku can be served warm or cold