In a casserole to put butter and honey to heat. The oatmeal are go added as soon as the butter will have loosened, and only to out fire. With the oatmeal we also add apples, raisin and filberts. To move the all to the baking-pan, and to flatten with a wood spatula. To mix in a bowl the egg, 3 spoons of yogurt, the ricotta (cottage cheese made of skim milk), the extract of vanilla and the honey. To mix up to get a good amalgam. To add the muesli on the fund of yogurt distributing it in uniform manner. To cook in oven for 25 minutes. The cake will have to solidify only centrally. Once cooked to pour uniformly the remained yogurt. To put again in oven for other 5 minutes. At the end to let cool, then to transfer on a course dish, to decorate with the filberts on the edges, and with the small slices.