Preheat oven to 400 F

Thaw puff pastry, unroll from the wrapper, and slice into 6 strips

Roll one strip on one mold, following the shape of the mold

Brush shells with beaten yolk and bake for 15 mins

Cool before removing from the mold as mold would be super hot.

Cool completely before filling.

Combine milk, flour, yolk, cream cheese and 50 g of cheese in a pot, beating with electric mixer. Sprinkle in salt and white pepper and bring mixture to boil on medium heat, stirring often. Mixture will be thickening.

Take off from heat and let cool to room temperature, completely

Once mixture is cooled, beat in left over butter and another 50 g of grated cheese.

Pour filling into a piping bag of ziplock bag, snipped the corner

Pipe some filling into shells and give some leftover cheese, the pipe some more filling, then top the filling with cheese again