Heat a tablespoon of oil in a medium frying pan. Mash the tofu with the back of a fork or a potato masher in a large bowl, until broken into small pieces, then add it to the frying pan.
Carefully lay the tofu in a stepped circle around the inside of a round baking dish, approximately 20cm/8in diameter and 4cm/1½in deep, so each piece overlaps with the next. Combine the eggs ...