Place the tongue in boiling water. After 15 minutes, add the bay leaf and peppercorns. Cook until done over medium heat. Cooking time depends on weight: 1 kg – 90 minutes, more than 1 kg – 180 minutes.
Sprinkle salt into a baking tray. Place the potatoes on the salt at a distance from each other. Place in an oven preheated to 200 °C for an hour. Check the readiness of the potatoes by piercing them with a fork.
When the tongue is cooked, take it out, let it cool a little and cut into pieces. Heat a frying pan, melt a piece of butter in it and fry the pieces of tongue.
Cool the cooked potatoes and peel them. Pour milk into a small saucepan and add butter. Heat until the butter melts.
Add potatoes to milk and mash into a puree.
Place the puree on a plate and place the pieces of tongue on top.