I mix sausage meat with assorted things...as per atleastit'snotMonday 's post, and always use puff pastry.
herbs, or a grated apple, or cheese, or smokey tomato chutney
once you have squidged it all together roll the pastry out almost as long as your tray, lay the sausage meat on in a tidy row, roll the pastry over the top, egg wash the top and roll until the egg wash bit is at the bottom, press lightly to make a good seal
Then egg wash the whole thing and only once egg washed do you cut into little sausage rolls as big as the end of your thumb, I set them onto a floured tray, and find that means they don't stick.
repeat until you run out of sausage and pastry. Make three times as many as you think you will need, you can freeze them on trays and put them into boxes and hoik out as many as you need they cook nicely from frozen
I have loads of trays so tend to just freeze them on the trays, and batch cook, NO ONE can resist a warm sausage roll.