Cafe Mingo's Sugo di Carne

unsalted butter

5- pound beef bottom round (cut into 2 inch cubes (beef top round roast is another option!))

red onions (halved, thinly sliced)

bottle Chianti or other fruity wine

peeled tomatoes with juice

brewed espresso

penne (I use DeLallo)

Parmesean cheese

Fresh parsley (finely chopped)