Potato and Onion Soup Au Gratin

Ingredients

• Soup

  • 2 onions, thinly sliced
  • 8 garlic cloves, thinly sliced
  • 2 tbsp butter
  • 1 leek, white part only, thinly sliced
  • 4 cups (680 g) red potatoes, peeled and cubed
  • 4 cups (1 litre) chicken broth
  • 1 ½ cups (375 ml) milk
  • ½ tsp ground black pepper
  • 2 pinches ground caraway seeds (see note)

• Toppings

  • ½ lb (225 g) bacon, chopped
  • 1 cup (100 g) sharp Gouda cheese, grated
  • 12 thin slices toasted bread
  • ½ cup (50 g) orange or white cheddar cheese, grated
  • 2 tbsp chives, finely chopped