To make stromboli, use your favorite bread dough. (In a pinch you can buy frozen dough or stop by your favorite Italian pizza spot and ask them to share theirs!)
Make a paste of:
2 egg yolks
1/4 cup grated parmesan cheese
1 Tbsp. flat-leaf parseley, chopped
1 tsp. garlic powder
1 tsp. oregano
2 Tbsp. olive oil
Roll out bread dough into a rectangle, and spread the above mixture all over the dough.
Layer the following ingredients in the center of the dough (this is my husband's favorite recipe, but you can fill the dough with anything you like):
~~pepperoni (sandwich size, from your grocer's deli section)
~~sliced green peppers
Roll up the dough lengthwise, sealing ends well. Place on baking pan, seam side down, and brush top with fresh beaten egg yolk. Let rest about 15 minutes.
Bake at 350 for 20 minutes. Bon appetit!
*(The second picture above was taken before I added another layer of pepperoni and the mozzarella.)