To prepare the tofu: Cut the drained tofu into four 3/4-inch slices. [That is, take each of the two tofu "slabs" and cut length-wise into thinner slabs. Given the size of the block of tofu we buy, we actually cut each block into 3 slabs, each approximately 3" x 3" x 3/4".] Mix the sesame oil, rice vinegar, and tamari. Marinate the tofu, turning frequently, for 1 hour. Soak 2 wood skewers in water for 15 minutes or so. With the tofu pieces lying flat, insert the skewers parallel to each other horizontally into the tofu [kind of like inserting "popsicle sticks"]. To grill: Cook 5 minutes, turn, and cook another 8 minutes, until the outside is slightly crispy and brown. Posted to JEWISH-FOOD digest by Shaul and Aviva Ceder on Dec 24, 1998,