Cut the tops from the garlic heads, nestle into a baking tray, drizzle over 2 tsp olive oil, tightly wrap the tray in foil and bake at 200ºC for 40-45 mins until golden.    Cool, then remove cloves from the peel and gently mash with a fork. 

Boil potatoes in salted water until soft.  Drain well, add milk, cream and butter, mash roughly then fold through mashed garlic.  Season to taste. 

Spoon into a serving bowl and scatter with parsley to serve.