1. get a tsar bomba 2. make the pizza in a concorde (toppings are in the center) 3. detonate the tsar bomba 19 km away, make sure the pizza is angled vertically 4. orbit the blast wave until the radiation hits, then fly away at supersonic speed 5. enjoy your billion-dollar meal
I call it the Manhattan Pizza (that's where a bit of Bee Movie takes place.)