Instructions

1. Preheat oven to 375 degrees. Line cookie sheet with parchment paper. In a medium mixing bowl combine the ham, cheese, onion, sour cream, egg whites and parsley until well blended. Add salt and pepper to taste.
2. Roll out the pastry puff with a rolling pin. Spread ham mixture and spinach onto the dough in an even layer.
3. Roll the dough up tightly, starting from the long side. Cut the roll in 1/2-inch-wide slices and place on cookie sheet. Brush the top of the roll-ups with egg yolk.
4. Bake for approximately 18 minutes or until pastry has desired color.
5. Variation Tip:Substitute sour cream with cream cheese, ham with salami or make a vegetable party roll-up.