I soak them in red wine over night. Dry them and lay out on a paper towel for a bit. Slice thin and quick saute in butter. Ahead of time saute' some onions and mushrooms and set aside. After saut�ing the thin sliced heart pieces, deglaze the pan with your left over wine that was used for the marinade. Throw the mushrooms and onions in the pan with the wine and reduce. Serve the sliced heart with the mushroom reduction.
Key note....Should be served rare to med rare so that it doesn't turn out tough.
