Technically, any ingredient is allowed on a pizza, and the toppings are regional. I just have never heard of this type of topping. Where I live, it is common to use toppings like bacon, ham, and pineapple. Pepperoni and mushroom is another popular choice. Salami is also popular. Lately, I have seen chicken with ranch salad dressing.
Yes I add pickles, just because it gives slightly salty taste and tuna yes it is already in can mixed with chili and garlic, I love this one :)
Technically, any ingredient is allowed on a pizza, and the toppings are regional. I just have never heard of this type of topping. Where I live, it is common to use toppings like bacon, ham, and pineapple. Pepperoni and mushroom is another popular choice. Salami is also popular. Lately, I have seen chicken with ranch salad dressing.