A French street-food sandwich, the pan bagnat, inspired this piquant pizza pie. It's light on the tomato sauce and full on with flavor.
Preheat oven to 500 degrees with rack in lower third lined with a pizza stone or baking sheet. Drizzle a rimmed baking sheet with oil, place pizza dough on sheet and stretch to a 13-inch round. Season lightly with kosher salt; drizzle with more oil. Stir together tomato sauce, anchovies, and a pinch of salt; spread over dough, leaving a 1/2-inch border. Top with mozzarella, roasted-pepper strips, and capers. Bake until cheese has melted and bottom is crisp, 10 to 12 minutes.
Meanwhile, toss 1/3 cup packed flat-leaf parsley leaves with 1/2 teaspoon white-wine vinegar, 1/2 teaspoon oil, and a pinch of red-pepper flakes. Top pizza with parsley mixtureand more pepper flakes; serve.