To make the butter: melt the butter in a small pot or skillet. Add the garlic and salt, remove from the heat, and let rest until ready to use.
To make the pizza: Preheat an oven or grill (whichever you prefer for cooking pizza). If using refrigerated dough, remove it from the refrigerator. Let the pizza dough rest, covered, at room temperature while preheating and prepping your toppings.
Combine the crushed tomatoes and salt in a small bowl. Thinly slice your peppers and grate your cheeses.
Stretch the dough into a 12-inch circle. Place on a floured pizza peel, spread the tomato sauce over the dough, and add an even layer of the peppers followed by the cheeses. Bake until the cheese is bubbly and the crust is golden brown and cooked through. (The cooking time will depend on your chosen pizza-making method.)
Remove the pizza from the oven and immediately brush the crust with the garlic butter mix. Finish with fresh basil before serving.