Preheat oven to 475°F (245°C). Place pizza stone in the oven or set aside baking sheet.
Roll out pizza dough into a 12-inch circle on a lightly floured surface. Transfer to parchment paper.
Spread tomato sauce evenly on dough, leaving a 1/2-inch border.
Sprinkle mozzarella and pecorino romano cheese over sauce.
Arrange salami, red onion, red peppers, and olives on top of cheese.
Drizzle olive oil over toppings and season with salt and pepper.
Slide parchment paper with pizza onto preheated pizza stone or baking sheet.
Bake for 12-15 minutes, until crust is golden and cheese is bubbly and slightly browned.
Remove from oven, let cool, and scatter fresh basil leaves on top.
Slice into 8 pieces and serve immediately.