An Italian sub, the traditional deli sandwich that piles some combination of cheese, cured meats and preserved vegetables onto a soft roll, is a beloved Italian-American classic. But toss those fillings onto a sheet pan and hit them with a little heat, and they caramelize and crisp into a complete dinner with loads of character — sweet and spicy, bitter and briny. In this recipe, salami, red onions, pepperoncini, tomatoes, radicchio and chickpeas get tossed with an oregano-garlic vinaigrette before roasting. The radicchio and red onion mellow, the tomatoes sweeten and the salami releases fat and seasonings that add more flavor and richness. (You can swap in cauliflower florets, cubes of squash or halved red potatoes for the radicchio.) Serve with a plop of ricotta for creaminess (or provolone and Parmesan, for a more traditional take), more vinaigrette and crusty bread for sopping it all up or piling it into a sandwich.