18. Mushrooms
17. Anchovies
16. Chicken
15. Olives
14. Eggplant
13. Extra Cheese
12. Ham/Canadian Bacon
11. Spinach
10. Broccoli
9. Peppers
8. Bacon
7. Plum Tomatoes
6. Meatballs
5. Fresh Garlic
4. Onion
3. Ground Beef
2. Pepperoni
1. Sausage
Photo by Seth W., via Flickr
