Put the flour on a plan, combine butter, ricotta cheese and a little salt. Knead the ingredients to obtain a homogeneous mixture. Allow to rest in a fresh temperature for half an hour, then spread the paste on the plan and cut small circles of 3 cm diameter: brush them with lightly beated egg; add a little pepper and bake them in hot oven (200°) for 15 minutes.
Spread the cream cheese on half the circles. Top with a slice of Prosciutto di Modena and cover with another circle, then serve.
The quantities indicated are enough for four people.