Peel and grate cucumbers. Peel all veggies. Dice potatoes. Slice carrot. Cut in half celeriac and onion.
Add celeriac, carrot and onion, olive oil, onion, allspice and bay leaves to a pot. Add 2.5L of water. Cook for 30min.
Boil water for cooking rice and cook the rice (but take it off before it becomes soft as it will cook in the soup as well).
Add potatoes and cook for 15min.
Remove celeriac and onion.
Add grated cucumbers, rice, MSG and soy sauce. Cook for 15min.
Add heavy cream.