Whisk together the 3 tablespoons of olive oil, shoyu, balsamic vinegar, brown sugar and adobo sauce. Pour 1/3 of the tempeh marinade into an 8x8 baking dish - you want a dish that is just big enough to hold the tempeh in a single layer - this way it will be fully enveloped by the marinade. Pour the remaining marinade over the top of the tempeh, cover and keep in the refrigerator for a couple hours, overnight or until ready to use.
