Colcannon soup

Ingredients

• 1 tablespoon vegetable oil
• 1 medium onion, finely sliced
• 2 medium potatoes, washed and cut into 2cm cubes
• 1 medium parsnip, peeled and cut into 2cm cubes
• ¼ teaspoon smoked paprika
• Freshly ground black pepper
• 300ml reduced-salt vegetable stock
• 150ml skimmed milk
• 300g Savoy cabbage or kale, finely shredded