Spread your filling down the entire center of the dough, leaving a bit of space on each side to pinch closed. Bush the edges with a little egg and pinch the whole thing closed.
Carefully lift the intestine onto the baking sheet and form an intestine looking thing, rolling it over so the pinched edge is on the bottom. Brush the pastry with beaten egg.
Dip your small brush into some red food coloring (I added a little blue, too, to get a darker color) and paint on the “blood.” (I just added the food coloring to the egg that was left and then brushed the whole roll instead of the little details. I think I'll do it the way the directions are next time.)