Kalja

Kalja is one of the oldest winter soups of Serbia, found particularly in the villages of Šumadija and Vojvodina where sauerkraut barrels are a household staple. It is a robust, fermented-broth soup of slow-cooked pork and whole sauerkraut leaves that warms from the inside out, deeply flavoured with paprika and lard-fried onion.

Serves: 6

Ingredients

• 700g (1.5 lb) pork ribs or pork belly, cut into serving pieces
• 800g (1.75 lb) sauerkraut (whole leaves if possible), liquid reserved
• 1 large onion, finely diced
• 2 tbsp (30g) lard or sunflower oil
• 2 tsp (10g) sweet Hungarian paprika
• 0.5 tsp (2g) hot paprika
• 3 garlic cloves, minced
• 2 bay leaves
• 1 tsp (5g) caraway seeds
• 500ml (2 cups) water or light pork broth
• 150ml (0.6 cups) reserved sauerkraut brine
• Salt and black pepper
• Sour cream, to serve
• Crusty bread, to serve

Instructions

1. In a large heavy pot, melt the lard over medium heat. Brown the pork pieces on all sides, about 6-8 minutes. Remove and set aside.
2. Add the onion to the same pot and cook until golden, about 8 minutes. Remove from heat briefly and stir in both paprikas — this prevents the paprika from burning.
3. Return to low heat, add garlic and caraway seeds, cooking 1 minute. Return the pork to the pot.
4. Add the sauerkraut (roughly chopped if the leaves are very large), bay leaves, water, and reserved brine.
5. Bring to a boil, then reduce heat, cover, and simmer gently for 1.5–2 hours until the pork is very tender and the sauerkraut has softened and taken on a deep flavour.
6. Taste before adding salt — the brine may provide enough. Add black pepper generously.
7. Serve in deep bowls with a dollop of sour cream and thick crusty bread.

Cook's Notes: Using whole sauerkraut leaves rather than shredded gives the soup a more traditional texture. Do not discard the brine — its tartness is what makes kalja distinctive from a standard pork soup. A slow cooker works perfectly; cook on low for 7-8 hours.