1/2 cup red wine vinegar
1/2 cup white grape or apple juice
1/4 cup finely chopped onion
1 clove garlic, minced
2 tablespoon rubbed dried sage
1 tablespoon freshly ground black pepper
1 tablespoon ground coriander
1 tablespoon dry mustard
1 teaspoon salt
1 cup olive oil
12 small-medium bulb onions and/or peppers
6 long metal or wooden skewers
Trim steak if needed; put into a glass or enamel bowl. Combine remaining ingredients, except whole onions and peppers; pour over steak, turning to coat with marinade. Cover and marinate at least 1 hour.
Remove steak from marinade, cut into portions. Soak wooden skewers in water before using. Thread meat onto long skewers, weaving meat around onions and peppers as you proceed.
Cook over hot coals or broil, 3 to 4 inches from heat, 12 to 15 minutes, turning to cook all sides. Brush meat with marinade as it cooks.
Makes 6 servings.