Tournedos of flavored beef

Ingredients for 4 people:
4 tournedos of beef sirloin
2/3 white onions
1 large bunch of marjoram and thyme
Mengazzoli vinegar with raspberries
oil
salt and pepper
Place the beef tournedos in a bowl, cover them with chopped onions, marjoram and thyme and pour the vinegar over the meat. Leave to marinate for 1 hour. Drain the meat and grease it with oil, in the meantime heat a cooking plate / grill and cook the meat. Remove it from the heat and on the same plate, quickly sauté the chopped onion drained from the vinegar. Serve the meat seasoned with onions.
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