These little nibbles are great served at a party and don't worry about them being vegetarian- even meat eaters will devour them (over anything you provide that has meat in it)!
Take some shop bought puff pastry and cut into three strips.
For the filling, simply 275g breadcrumbs and same of grated cheese, one greated onion, 3 tbsp double cream, some chopped herbs, 1.5 tsp mustard powder, pinch cayene pepper in a mixing bowl, season well and mix very thoroughly.Then roll out the pastry on a floured surface to form an oblong (as thin as you can). Cut this oblong into three strips and divide the filling also into three, making three long rolls the same length as the strips of pastry (if it's sticky, sprinkle on some flour).
Place one roll of filling on to one strip of pastry. Brush the beaten egg along one edge, then fold the pastry over and seal it as carefully as possible.
Lift the whole thing up and turn it so the sealed edge is underneath.
Press lightly and cut the rolls obliquely, so that they form little diamond shapes. Snip each one on the top in three places with the end of some scissors, then brush with beaten egg. Repeat all this with the other portions of filling and pastry.