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.