Fry off onions, and bacon, then transfer to a bowl and allow it to cool. Then add the garlic, pepper, salt, 1 egg, and panko crumbs, and add the brisket and mixture well.
Layout the pastry, with the long edge closest to you, brush egg or water along one long edge. Get 1/4 of the mixture and shape it into a log down the middle of the pastry sheet.
Then the edge was egg or water, then roll-up. Make sure the seam is down. Brush the edge of the pastry with egg. Then roll up, finishing with the seam side down.
Preheat the oven to 350°F and brush your sausage rolls with egg wash. Cook for 30 – 40 minutes until the pastry is golden brown. Cool slightly on trays then serve and enjoy!