Remove the puff pastry from the fridge and allow to come up to room temperature.
Preheat oven to Gas 5.
In a large bowl, mix together the breadcrumbs, minced garlic, herbs, salt and pepper.
Add the minced pork, Dijon mustard and finely diced onion.
Using your hands, massage the mixture together to form a meaty paste that will hold together.
Roll out the puff pastry on a clean counter-top and cut in half length-ways into two even rectangles.
Take the meat mixture and roll into two even logs and place along the long edge of the pastry sheets.
With a pastry brush, egg wash the opposite long edge of the pastry and fold shut to create the sausage roll. Use a fork to crimp the edge after.
Egg wash the pastry and sprinkle with sesame seeds.
Cut each roll to your length of choice which will depend on if you want cocktail, normal or jumbo sausage rolls. This recipe will create 8 normal sausage rolls or 24 cocktails.
Bake for 25-30 min until golden brown.
Enjoy.