This sound´s crazy but I learned this in Sweden, its delicious:
Instead of the traditional pizza sauce you use Bernaise sauce.
Sliced beef (ox file)
mushrooms.
cheese (ofcourse)
and an egg in the middle.
I was sceptic at first to, but after I tried this, I was hooked.
You can also use your favorite veggies or whatever, but the crucial thing here is the beef and the bernaise.