Vegetarian chilli beans

Ingredients

• 2 tablespoons olive oil
• 2 large onions (400g), chopped coarsely
• 2 trimmed celery stalks (200g), chopped finely
• 1 large yellow capsicum (bell pepper) (350g), chopped coarsely
• 1 large red capsicum (bell pepper) (350g), chopped coarsely
• 3 fresh long red chillies, chopped finely
• 3 large cloves garlic, crushed
• 2 tablespoons smoked paprika
• 1 tablespoon ground coriander
• 1 tablespoon ground cumin
• 1 tablespoon fresh oregano leaves
• 3 cups (750ml) vegetable stock
• 2 x 400g cans diced tomatoes
• 2 x 400g cans four-bean mix, drained, rinsed
• 60 grams dark chocolate (70% cocoa), grated
• ¾ cup (90g) finely grated cheddar (see tip)
• corn chips and lime wedges, to serve