Mix the flour with the yoghurt and mineral water until smooth, then add the egg and stir vigorously again, season with salt and a little pepper.
Set aside and let soak for about 10 minutes.
Clean and dice the radishes. Dice the cooked ham as well. Mix both with the finely chopped herbs, garlic and yoghurt. Season to taste with salt and pepper.
Brush a non-stick pan with the oil and bake two thin pancakes, then arrange with the herb and radish yoghurt and serve.