Preheat the oven to 350°F (180°C)
Lightly grease a cupcake tin with butter or oil.
In a bowl, mix the eggs and cream together. Stir in the cheeses, reserving a little Grana Padano to sprinkle on top of each cup.
Stir in rosemary and green onions.
Carefully take your prosciutto strips and line each segment of the cupcake tin to form a cup.
Fill each cup up to a maximum of ⅔rd full with the egg mixture.
Sprinkle remaining Grana Padano on top and place into the oven for 15 minutes or until golden.
Leave to cool for 5 minutes before removing from the tin, enjoy!
Top with sour cream and green onions.
