What's an underrated pizza topping?

Italian sausage. No, I know everyone likes it, but that's still not capturing its full glory: it is the best topping, but most people are like 'yeah it's alright but it's no pepperoni'. No, it's better than pepperoni, and therefore underrated.
- I hate pepperoni, team sausage & mushrooms, all the way. The worst is pepperoni that curls into a bowl shape and holds grease, ick.

Not a topping but mustard as a dipping sauce for my pizza crust. I’m not a crust person. But dipping dry crunchy crust into mustard almost feels like eating a pretzel.
Tastes great with pepperoni too.

Anchovies. Salty oily goodness
- I used to get it on my pizza at work knowing none of my coworkers would steal it.
- None of the pizza places near me even have it as a topping 😭

Olives, Feta
- Added some spinach, diced tomatoes, maybe some onions, Greek pizza baby! Amazing pizza.

Potato.
I mean, have you ever seen potato on a pizza? I haven't.
- Boston Pizza:
- Yes, back around 24 years ago I was picking my sister up from her university and went into the student union building. The pizza place inside had a pizza with potatoes, broccoli and some kind of meat. I believe it was called the Sunday dinner pizza.
- Mashed potatoes on pizza is incredible and I'm being 100% serious

Chopped hazelnuts. I add them if I ever have home cooked pizza
- Cashew, chicken, cranberry and Camembert is a good combo.

Feta.
- mmm the best pizza in my town is from a Greek restaurant, and my favorite is with gyro and feta. lawd have mercy...

Oregano. For some reason, my local pizza place takes extra money for putting oregano on the pizza. No problem, I have my own supply of oregano for my pizza.
- Power move

I've been working my way through the pizzas at Pizza Artesanal.
The roasted potato and roasted pumpkin cream were two toppings that really stood out as surprisingly delicious.

Meatballs. Have yet to see any pizzeria offer it but whenever we do a homemade pizza and there happens to be leftover meatballs, it's fantastic.

Gyro meat. It's like sausage but better. Fantastic with Canadian bacon and salami.
Also, salami.

Sweet potato!
I've only seen it available at one pizza place and would get it with chicken, bacon, and a barbeque-sauce base.
Edit: The lobster pizza I had in Maine was pretty good too. They put lobster on everything up there!

I have an anti-topping suggestion: no cheese. Try it, especially if you like lots of different toppings and veg. You'll actually be able to taste them without that bitter yellow slime enveloping everything.
I'm not a vegan or anything. I just think pizza is so much better without cheese.
- If a pizza place has bad cheese it isn't worth eating. Only eat pizza with good cheese
- I started making vegan pizzas this way. Deconstruct the red sauce too and just use sliced tomatoes, spices and olive oil as the base, then fresh veggies on top. It's like bruschetta pizza.
  If you want to go no-cheese and are missing a little umami flavor, like the savory you'd get from Parmesan, sprinkle on nutritional yeast. If you are missing the creamy flavor of mozzarella, cashew paste in little pearls all over the pie works

Tomato.
It adds a wonderful contrast to something heavy or greasy like sausage. If I order a pizza that’s usually what I’ll get, but only at some pizza joints