Mac 'n' Cheese Wellington

Name: Mac 'n' Cheese Wellington
Ingredients: Heat the butter until foaming then whisk in the flour. Slowly whisk in the milk, a little bit at a time, then add the cream and keep whisking to make a smooth sauce.; Season with salt and the mustard then whisk in the cheddar and gruyere. Stir in the cooked pasta and mozzarella and pour into a lined loaf tin to set for about 1 hour in the fridge.; When the mac n cheese feels solid preheat the oven to 180°C/360°F. Lay the bacon on the puff pastry sheet and place the mac n cheese on the near edge and roll it up in pastry. Pinch the edges together and transfer to a baking tray and brush with the yolks.; Bake for around 40 minutes until golden brown and piping hot.