Mushrooms are washed and cut into slices, leeks cleaned and cut into rings, ham - small cubes, cheese grate. The oil is heated. It fry sliced ​​mushrooms, and then drained from the oil and set aside. Fry chopped leek rings, add salt to taste, drain from the oil. Oil be suitable for banitsa tray (larger). Originally put 2 sheets of foundation. On the first sheet ranks of the leeks, put it another crust. The butter is melted and crust is coated with a part of it. On her ranks of the mushrooms. It ranks as new crust, smeared with butter and put some of the grated cheese. Again put new crust is smeared butter and put ham. Sheet lining so fully, to finish the banitsa put back two sheets - as in the beginning. TOPPING of the banitsa is made from beaten eggs, yogurt and repaid it in soda. The banitsa before baking pre-cut, pour the mixture and rotated by hand to distribute the topping evenly on all parts and corners of the banitsa. Bake in preheated 220 C oven until golden-brown crust. If remaining cheese can be sprinkled with him immediately after removal. Serve hot, accompanied by kefir or yogurt puree.