HEAT oven to 400°F.
ROLL out the puff pastry, on a floured work surface, to about 9″x12″.
SPREAD the grainy mustard onto the pastry.
LAYER on the cheese and deli turkey and ham meat.
ROLL it up lengthwise, and cut into 12 equal portions.
PLACE them cut-side down on baking sheet and freeze for 15 minutes.
BRUSH with egg mixture.
BAKE for 17-20 minutes, until golden brown.