Peel and cut swedes in large cubes. Place on a baking tray with 1 tbsp unsalted butter. Bake until tender, about 1 hour (stir the butter once it has melted).
While the swedes cook, mix meatball ingredients and form golf-sized balls. Place on a baking tray lined with baking paper or foil.
When the swedes are cooked, remove from oven and rise temperature to 200°C (180°C fan-forced).
Place meatballs in oven and cook for 15-20 minutes.
While the meatballs cook, place swedes in food processor with the rest of the butter and salt. Process until smooth.
Serve meatballs and mash with wilted greens, garnish with parsley or chives.