Step 1: Clean celeriac root and dice it; fry in olive oil and scald with boiling water.
Step 2: Shop celeriac leaves.
Step 3: Boil all above ingredients and add one or two spoons of flour. Cook until celeriac is soft.
Step 4: Season with chopped onion, garlic and breadcrumbs fried on butter.
Source: Janez Bogataj (2007): “Taste Slovenia”, National Geographic