In a small saucepan heat the milk. In another pot, melt the butter, making sure it doesn’t burn. Add the flour and stir well with a whisk. Pour in the milk and whisk all ingredients together well. Add plenty of freshly ground pepper and nutmeg. When the b?chamel is ready, pour in the cheeses and stir. If necessary add more salt and pepper. Add the eggs and stir. Put the mixture aside. In a buttered oblong pan place half the wrinkled filo sheets from the packet, brushing each with butter. Pour the b?chamel over the layers. Add the remaining wrinkled phyllo sheets except the last two, which are rolled out. Cut the pie into serving pieces and pour on the soda. Let it sit for 5 minutes.