1.Dissolve The Beef Bouillon Cubes In 1 Quart Water, And Pour Into A Slow Cooker. Place Turkey In Slow Cooker, Adding More Water To Cover If Needed. 2.Cover, And Cook 8 To 10 Hours On Low. Two Hours Before End Of Cook Time, Mix The Vinegar, Onion, Green Bell Pepper, Garlic, Oregano, And Worcestershire Sauce Into Slow Cooker. 3.Blend The Brown Gravy Mix And Water In A Small Bowl, And Stir Into The Slow Cooker, Continue Cooking 20 Minutes.