Rinse and dry the meat with kitchen paper. Cut it into slices about 3-4 cm thick.
Wrap each piece in bacon and tie with kitchen string. Cook the bites in a pan with butter for about 4-5 minutes on each side. Season with salt and rosemary.
Check the cooking status by making a small cut.
Turn off the heat and let it rest for a few minutes. Then serve, garnishing the dish with a sprig of rosemary and Extra Aged Traditional Balsamic Vinegar of Modena PDO.