Yes, you can freeze the marinade, but don't freeze the marinated tofu. When tofu is frozen, its pores and flesh explode and get spongy. It does increase the tofu's meaty texture, but it won't soak the marinade as well if frozen in its marinade. The best is to freeze the tofu, thaw it, and remove the liquid that comes out. Then, marinate the frozen, thawed tofu.