Cut your meat 1 1/2 inches thick and thread onto 7 inch long skewers.
Place skewers in a 6 quart Crock-Pot layering as flat as possible.
combine soy sauce, brown sugar, oil and garlic in a small bowl. Reserve 1/2 cup of sauce, set aside. Pour remaining sauce over the skewers. Cover , cook on low 2 hours. Turn skewers and cook 1 more hour.