Heat some oil in a large pan, fry the diced onion with the sliced chicken breast, then place in an ovenproof serving bowl or casserole dish and set aside.
Now fry the sliced mushrooms vigorously in the pan and then also place them in the serving bowl or casserole dish.
Finally, the sliced jacket potatoes are fried well in the pan and then also placed in the baking dish.
Mix everything together and season with salt, pepper and paprika
Whisk the eggs with the cream and pour over the mixture and bake in the oven at 200 degrees for about 10 minutes.