In a bowl, mix plenty of olive oil with mustard, lemon juice, oregano, vegeta, crushed garlic and rosemary. Turn the meat on all sides and place in an ovenproof baking dish. Spread the rest of the marinade on top. Cover the mold with aluminum foil and let the meat soak in the marinade for at least 3 hours. The longer it can steep, the more tender the meat will be.
Place the meat in the hot oven at 220 ° C top / bottom heat for approx. 20 - 30 minutes.