Cover the bottom of an 11 x 8-inch (28 x 20 cm) baking dish with one-quarter of the tomato sauce (about ¾ cup). Top with one-third of the zucchini, then one-third of the tofu slices. Sprinkle with one-quarter of both cheeses (about ½ cup of cheese). Repeat with the remaining ingredients, topping with a layer of tomato sauce and sprinkling with cheese.