Ragoût de Boulettes (French Canadian meatball stew)

Ingredients

• 1/2 celery root
• 2 carrots
• 1/3 oz parsley
• 1/2 parsnip
• 1 leek
• 2 onions
• 5 sprigs summer savory
• 14 oz green beans
• 1 pork knuckle
• 2 bay leaves
• 3 allspice berries
• 2 1/4 lbs ground pork
• 1/4 tsp ground cloves
• 1/4 tsp ground cinnamon
• 1 tsp Dijon mustard
• 7 tbsp flour
• 1 tbsp water
• butter (for frying)
• boiled potatoes (for serving)
• salt
• pepper