You can use any frozen pizza of your choice, I prefer Red Barron because it's usually on sale, and I prefer a thin crust.
You can use Olive Oil in place of the butter
Add any extra toppings that you would like! The sky is the limit.
Be mindful of the cooking time, and adding extra toppings, you may need to pre-cook some things or cook the pizza for a few extra minutes in the oven.
Fresh herbs will have the best taste but dried herbs work just as well, and are better if you are on a budget!
Using fresh mozzarella will be delicious, but any cheese you like will work just fine! Keep an eye out for sales on Mozzarella in the deli section of your grocery store.