Is pizza a vegetable? It's an interesting question to consider, especially as your browse the supermarket aisles. Among the shelves, you'll see fresh tomatoes, bell peppers, jalapeños, black olives, mushrooms, red onions, and even pickles (which were cucumbers in their former lives). One thing we can say for sure is that all of these items certainly are vegetables. They're also toppings you can add when you build your pizza, customized at Hungry Howie's®.