Can put any vegetables/meats you want to inside... I like a couple kinds of italian meats plus peppers, mushrooms, spinach. Also use mozzarella and parmesean cheeses. Can sprinkle shredded parmesean on top for a crispy cheese crust... get creative!
Broccoli & Cheese Stromboli (Tried: Delicious! We used puff pastry dough worked through with extra basil and butter instead of the homemade pizza dough, and it turned out great. Very flaky!)