Preheat oven to 350°F
Cut block of tempeh into 1/4 -1/2 inch thick slices
(Optional) Steam or poach slices for 2-3 minutes. Remove from hot water and set aside.
In a food processor, blend together all the marinade ingredients.
Pour the marinade over the tempeh and stir gently to coat. Allow tempeh to marinate for at least half an hour (You can also store marinated tempeh in the fridge for 2-3 days).
Pick the tempeh slices out of the marinade and put them on a lightly oiled baking sheet. Reserve marinade.
Bake for about 10 minutes. Flip the slices and baste with a bit of the marinade, making sure to reserve at least a few tbsps.
When tempeh is golden-brown, pour the rest of the marinade onto the tempeh. Allow to cook for another 2 minutes, and then remove from the oven.