With the aid of a food processor or fork, combine your pork meat, black pepper, minced garlic or dried coriander leaves, salt and ground nutmeg. Set aside.
In a large bowl, add your plain flour, baking powder, salt and sugar. Mix with your hands or spatula to combine well.
Add your cold butter and mix thoroughly with your hands to get a crumbly texture, just like breadcrumbs.
In little increments, add your cold water and mix well. Keep doing this till you get a non-sticky dough. Place on a lightly floured surface and knead for a couple of minutes. DO NOT OVERWORK YOUR DOUGH then allow your dough to rest for about 30 minutes.
Break and whisk your egg then set aside for later use (egg wash).
Preheat the oven to 200 degrees Celsius or 400F.
Get out your dough from its resting place, place on a lightly floured surface and divide. Roll out the portion of dough cut out with a rolling pin till you get the thickness you prefer and a rectangular shape.
Place your sausage meat on the dough, fold then seal with your egg wash using a pastry brush. Repeat the process till your dough has been exhausted.
Place sausage rolls on a baking tray lined with parchment paper or aluminium foil. Make a few holes or cuts with either a fork or knife on the top of your sausage rolls and brush with your beaten egg ( Egg wash).
Bake sausage rolls in a preheated oven of 200C (400F) for about 25 minutes or till golden brown.