Sweet potato, swede and spring greens gratin - The Fuss Free Foodie

Ingredients

• 1 large onion (approx 260g), cut in half and sliced
• 1 medium swede (approx 500g), diced, 1cm by 1cm
• 2 sweet potatoes (approx 500g) diced, 1cm by 2cm
• 250g spring greens, stalk cut out
• 7 sage leaves, finely chopped
• 2 garlic cloves, minced
• 250ml double cream
• 100ml milk
• 1 tablespoon butter
• 1 tablespoon oil
• 50g Parmesan, grated
• Nutmeg (4 or 5 rasps)
• Salt and pepper