Use 1 big tongue, cleaned and washed well
Use 1 tsp sodium benzoate
Use 1 tsp saltpetre
Use 6 tsp salt
Use 2 tsp sugar
Use 2 tbsp vinegar or lime
Dissolve sodium benzoate, salt, sugar and salt in half a glass of water on low heat. Add lime or vinegar and pour this mixture on the tongue and with a fork prick it all over. Keep this in the fridge for 4 days, turning it everyday.
On the 4th day, pressure cook the tongue for 45 minutes, on slow fire.