1 Use 3/4 cup of soy sauce, 3.5 oz of liquid smoke, and 1/2 cup of brewed coffee for your marinade. 2  For a vegetarian version of this, try using seitan (wheat protein) or marinated tofu. 3  Try using an oven with a timer, that way you don't sit up all night! 4  Try a soy sauce based marinade.