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cherylcolman
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Start by chopping the sweet onion finely, then place in a cast iron pan with 90 g of butter. Cook at medium low heat for 15 minutes, add 1 tbsp of sugar and let it caramelize and cook slowly. Add 4 oz. of red wine and keep be patient. You want all the liquid to disappear. It will take 30 to 40 minutes.
Set aside and start working on the meat. Slice each piece of flank steak into two just like shown in the video. Fill with a generous amount of caramelized onions, swiss cheese and few sprigs of fresh oregano. Wrap tightly using a kitchen twine.
Slice the meat against the grain into 1 inch slices. Cook on top of a grill until internal temprature is 130°F for medium rare. You can cook to 140°F if you prefer it more medium.
Serve with mashed potatoes and enjoy!