First, finely slice the cooked, peeled potatoes. Peel the onion and cut into fine cubes.
Carefully mix both in a large bowl with the remaining ingredients for the salad. Finally, mix in the Vogerlsalat.
Cut the chicken fillet into 3-4 long pieces. Salt and coat in flour, egg and breadcrumbs and fry in hot fat for about 2 minutes until golden.
Drain on a piece of kitchen paper, arrange with the salad and serve.