In a bowl, whisk together egg and milk. Melt small amount of butter in frying pan. Dip both sides of bread in egg mixture, then immediately place slices in the frying pan and fry until bread is golden brown on both sides. Spread softened cream cheese on French toast. Add a layer of banana slices, then your favourite fruit preserve, and top with another slice of French toast. This can be served right away, or refrigerated and warmed up later or even served cold.