- Grill the sausages for 10-12 mins, turning frequently. Meanwhile, peel and roughly chop the parsnips and potatoes, then cook in boiling salted water for about 10 mins. Shred sprouts, add to the pan for the last 2-3 mins and cook until all the vegetables are tender.
- Drain and mash the vegetables, then beat in the milk and mustard with salt and pepper. Serve with the sausages.