Place beef tenderloin in a shallow baking dish. Pour the Zesty Italian dressing over the beef. Spread the mustard, 3 cloves of garlic, onion, salt and pepper on top of the beef. Cover the meat and let marinade for 2-4 hours. Place the tenderloin on the rotisserie and cook it for about 1 1/2 hours. For the last 15 minutes of cooking, place the butter and remaining garlic in a bowl in the microwave. Baste all sides of the beef with the garlic and butter. Once you remove the beef from the grill, cover it with foil for 10 minutes. The meat should be brown on the outside and medium on the inside. Slice very thin and serve.
By Robin from Washington, IA
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