Peel the potatoes and cut into discs. Mushrooms too. Put them in a baking dish - best rectangular. Watering with less fat and less water. When water is evaporated put chicken choppy julienne and boned. Leave to pozapeche emerge until the fat on top and remove from oven. Add processed cheese and stir until dissolved. Sprinkle with cheese and bake again until golden. Dissolving the feta cheese should retain some water in the pan to dissolve better.