Hearty Swiss Chard, Orzo, Mushroom and Pancetta Soup

Ingredients

• • 6 oz (170 g) pancetta, diced
  • ½ lb (225 g) cremini mushrooms, quartered
  • 2 tbsp (30 ml) olive oil
  • 1 leek, white part only, thinly sliced
  • 1 lb (450 g) Swiss chard, stems and leaves separated, thinly sliced
  • 6 cups (1.5 litre) low-sodium chicken broth
  • ½ cup (100 g) orzo
  • 2 slices country bread, halved lengthwise
  • ½ cup (50 g) sharp cheddar cheese, grated
  • 1 tsp chives, finely chopped