Sweet Potato Casserole

'Boil plenty of water in a large pot and add sweet potatoes

Cook until they're tender.'

'Remove from heat, peel and mash the sweet potatoes while still warm.'

'Combine egg, yolks, milk, wheat flour, and salt

Mix well.'

'Spread this mixture over a 20x30cm baking dish that's been greased and lined with parchment paper

Bake in a preheated oven at 200°C for 20 minutes.'

'Reserve.'

'Prepare the filling: melt butter in a saucepan, then add wheat flour and cook until lightly browned.'

'Add milk, yolks, Parmesan cheese, and palm hearts

Stir constantly until thickened.'

'Remove from heat and let cool slightly.'

'Unroll the dough and place on a clean cloth.'

'Spread the filling over the top.'

'Roll up tightly, starting with the long side like a log.'

'Serve warm

Makes 12 servings.'