Bake on the middle rack for about 25 minutes. Every oven is a little different so you may want to check it at 20 minutes and use your judgment. It should be golden brown and the dough should be cooked through. Here is what it should look like...
Let it cool for about 10 minutes before slicing. Use a sharp knife and try not to press the dough down while cutting. This is best when served hot/warm but I also enjoy it cold.
Now, for some variations......
Spinach - add mushrooms; use turkey pepperoni or light cheese for less calories/fat, but I don't recommend fat free cheese
Ham & Cheese Stromboli - use sliced deli ham or leftover ham from a ham steak or spiral along with cheese, like cheddar
Meatball or Sausage Stomboli - slice meatballs and sausage (or just one) and mix with red sauce and Italian Cheese
Chicken & Broccoli - shred or cube cooked and seasoned chicken with slightly steamed chopped broccoli florets with cheddar cheese
Breakfast Stromboli - scrambled eggs, your favorite breakfast meat (ham, bacon, sausage), your favorite omelet veggies (onion, mushrooms, peppers) and cheese if you like
There are many, many more possibilities. I've made all kinds because they are simple and delicious. They are kid friendly and great for gatherings and celebrations. What will your Stromboli be?