How to cook Grilled Beef

 Ingredients:

    * For the Marinade:
    * 6 beef filet mignons (approximately 7 ounces each), trimmed
    * 2 tablespoons balsamic vinegar
    * 2 cloves garlic, crushed
    * 4 sprigs rosemary, bruised
    * 1/4 cup olive oil
    * 1 teaspoon coarsely cracked black peppercorns
    * Salt
    * For the Sauce:
    * 1 cup onion, chopped into 1-inch pieces
    * 1/2 cup carrot, chopped into 1-inch pieces
    * 1/2 cup celery, choppd into 1-inch pieces
    * 1/4 cup olive oil
    * 6 cloves garlic, crushed
    * 2 bay leaves
    * 2 tablespoons tomato paste
    * 1/4 cup balsamic vinegar
    * 1/4 cup red wine vinegar
    * 2 cups red wine, preferably Cabernet
    * 1-1/2 quarts veal stock or roasted chicken stock
    * Salt and black pepper to taste
    * Garnish: 2 tablespoons chive batons, cut 1 inch in lengthIngredients:

    * For the Marinade:
    * 6 beef filet mignons (approximately 7 ounces each), trimmed
    * 2 tablespoons balsamic vinegar
    * 2 cloves garlic, crushed
    * 4 sprigs rosemary, bruised
    * 1/4 cup olive oil
    * 1 teaspoon coarsely cracked black peppercorns
    * Salt
    * For the Sauce:
    * 1 cup onion, chopped into 1-inch pieces
    * 1/2 cup carrot, chopped into 1-inch pieces
    * 1/2 cup celery, choppd into 1-inch pieces
    * 1/4 cup olive oil
    * 6 cloves garlic, crushed
    * 2 bay leaves
    * 2 tablespoons tomato paste
    * 1/4 cup balsamic vinegar
    * 1/4 cup red wine vinegar
    * 2 cups red wine, preferably Cabernet
    * 1-1/2 quarts veal stock or roasted chicken stock
    * Salt and black pepper to taste
    * Garnish: 2 tablespoons chive batons, cut 1 inch in length