Inside-Out Pizza Roll

Use Heidi's Pizza Dough recipe or your own

Create inside filling (I like to use left over meat spaghetti sauce -just beefed up a bit)
Or use this recipe (makes 7 cups):
1/4 cup extra-virgin olive oil
1 onion, finely chopped
1 carrot, finely chopped
2 ribs celery, finely chopped
1 clove garlic, finely chopped
2 lbs ground beef
1/2 c dry red wine (optional)
one 28-ounce can tomato puree
1 cup water
salt and pepper

Step one: heat oil (medium low heat)
Step two: cook onion, carrot & celery until soft - stirring occasionally
Step three: add garlic & cook until fragrant (about 1 minute)
Step three: increase heat to medium high, add the beef and cook breaking it up until cooked (about 8 min)
Step four: add in wine and cook until the liquid is cooked off, (about 5 minutes)
Step five: stir in tomato puree and 1 cup water; season with salt and peper
Step six: partially cover and cook over low heat, stirring occasionally for the last 30 minutes, until thickened (about 2 hours)

This is a great recipe - I puree all the vegetables once they are cooked for my picky eaters.
But really you can do anything you want. Some people add 1/4 c. chopped pancetta at the beginning. I never have it on hand.

Step seven: punch down the risen dough and transfer to a lightly floured work surface. Using a rolling pin, roll out to a 12 by 16 inch rectangle.
Step eight: scatter mozzarella cheese on top, leaving a 1 1/2 inch border.
Step nine: spoon on the meat sauce mixture over the cheese.
Step ten: brush the border with beaten egg and roll the dough up loosely, beginning at the short end.
Step eleven: transfer to a parchment-paper-lined baking sheet, brush with more egg and cut 3 vents o top.
Bake until golden brown (30-40 minutes) at 375 degrees.