Potato leek soup

• 3 leeks, halved and sliced
• 2 potatoes, diced
• 1 celery root, diced
• 4 1/2 cup stock
• 3 Tbsp butter
• 1 cup buttermilk or 1 c soy milk + 2 T lemon juice

1. Fry leeks in butter with pinch of salt...10 min
2. Add potatoes and celery root to fry pan...10 mn
3. Add stock, bring to boil
4. Cover, simmer...30 min
5. Stir in buttermilk or substitute and puree
6. Add any additional seasonings

leeks, potatoes, celery root, stock, butter, buttermilk

Taken from cookpad.com/us/recipes/490052-potato-leek-soup (may not work)