Preheat oven to 350 C/ 175F . Gather Ingredients (duxelles should be cold).
Butterfly Flat iron to ½ inch in thickness.
Next lay an even layer of pancetta over the flat Iron.
Spread an even layer of duxelles
Roll the meat evenly like a pinwheel
After you have a nice even tight roll you will need to truss the roll to keep it together during cooking.
Heat a nonstick pan, medium- high heat
When hot, sear the seam side first to bind the meat together.
Sear all sides and finish in the oven until you reach 145F/63C 8-10 minutes Tip: Rest for 5-10 minutes before cutting