Heat oven to 200C
Prick potatoes all over
Put in oven and cook until softened ( about 1 hour )
Remove from oven
Cut tops from the potatoes
Scoop out the insides into a bowl
Mash down , add seasoning , cream ( if using ) and egg yolks , mix well
Mix in the cheese
Put the top of the potatoes into the empty cavity
Top with the cheesy mash mix , use a fork to create texture on top
Put on a baking tray and brush with a little melted butter return to oven for about 20 minutes
Serve with a salad as a main dish