How to Make It
Preheat the broiler. Spread the sardines open on a large baking sheet, skin side down. In a medium bowl, combine the bread crumbs, green and black olives, 1 1/2 tablespoons of the olive oil and the rosemary and season with salt and pepper. Top each sardine with 2 heaping tablespoons of the bread crumbs, pressing them to adhere.
Divide the remaining 1/2 tablespoon of olive oil between 2 large nonstick ovenproof skillets. Arrange 6 sardines in each skillet, skin side down, and cook over moderately high heat until browned on the bottom and cooked through, 3 to 4 minutes.
Set the skillets under the broiler, 1 at a time if necessary, and broil for 1 to 2 minutes, or until the bread crumbs are golden and crisp. Serve the sardines immediately with lemon wedges.