Prepare potatoes as above. Preheat oven to 180℃/356℉.
Grease a 20 x 20cm square baking tin and line with baking paper.
Whisk yoghurt and flour in bowl, try to remove lumps as much as possible. Whisk in yoghurt and beat lightly until smooth and no more flour lumps.
Put half the sliced cooked potato on bottom of pan in a single layer. Put half salmon on top. Season with herbs and salt and pepper. Pour on half the yoghurt mix.
Repeat the layer of potato, salmon, seasoning and yoghurt.
Bake for 30-35 minutes or until mix has risen and eggs are cooked.
Bake is surprisingly filling and goes a long way. Can be used as a main meal, or as a snack.