For the savory pancakes, mix flour and milk until smooth, add eggs, melted butter and pinch of salt and mix until smooth.
Melt some butter in a large, shallow pan, pour in a little batter. Swirl the pan to spread the batter so that a thin layer covers the entire bottom. Bake the pancakes on both sides until golden brown.
For the filling, mix the sour cream with the yogurt and herbs of your choice and season with salt.
Wash the iceberg lettuce and cut into fine strips. Clean the tomatoes and cucumbers and dice them.
Fill the pancakes in turn with sauce, lettuce, cucumbers and tomatoes.
Fold the spicy filled pancakes, or roll them up with the edges folded in, and serve warm.