What toppings are typically served with a Pizza sandwich?

A pizza sandwich typically features toppings that reflect traditional pizza toppings, which include a variety of vegetables and meats. Mushrooms and onions are classic ingredients found on many types of pizzas, contributing to the overall flavor and texture. These toppings work well together, enhancing the sandwich's savory profile.

The other options, while they include valid ingredients used in various food items or pizza styles, may not align with the conventional understanding of toppings for a pizza sandwich. For example, pineapple and jalapenos offer a more unconventional combination that is less common in the traditional sense. Similarly, while meatballs and peppers can be seen in other Italian-inspired dishes, they may not be the first choices that come to mind for a pizza sandwich. Therefore, mushrooms and onions make a fitting choice as they maintain the familiarity of pizza flavors while being suitable as a topping for a sandwich form of the dish.