Peel, wash and slice the potatoes and cook in salted water for about 15 minutes. Cut the chicken breast into strips, fry lightly and season a little more generously with pepper, salt and paprika powder.
Quarter the red pepper and cut into strips, cut the onion into rings and continue to fry both with the chicken strips until the meat and onions are lightly browned.
Put the potatoes, fried chicken strips, peppers and onions in a baking dish. Scatter a lightly heaped tablespoon of granulated chicken stock over the top. Whisk 100 ml water with a beaker of sour cream and pour over the chicken, potato and bell pepper mixture.
Scatter a heaping tablespoon of breadcrumbs on top and finally sprinkle with the grated Emmentaler. Bake in a preheated oven at 220 ° C until the cheese is golden brown.