Using a large pot, heat the oil and sauté the finely chopped meat and the trotters. Add the spring onions, salt, pepper, two cups of water and let them boil over low heat. One hour later add dill, fennel and the finely chopped lettuce. Make sure that the water covers the magiritsa. After you taste it (you don't break the fast with only a taste) and the meats are done, remove from heat.