4 medium zucchini, sliced lengthwise into 1/2-inch-thick planks
Fine sea salt
½ cup panko bread crumbs
½ cup grated Parmesan
4 anchovy fillets, minced
1 garlic clove, finely grated or mashed to a paste
½ teaspoon herbes de Provence or dried oregano
Pinch of red-pepper flakes, plus more for serving
4 ounces mozzarella, grated (about 1 cup)
3 tablespoons chopped, pitted black or green olives
2 tablespoons torn basil or parsley leaves
Lemon wedges, for serving
Heat broiler. Brush a rimmed sheet pan with olive oil, then lay the zucchini out in an even layer. Brush zucchini with more oil and sprinkle generously with salt.
Broil until golden brown, about 5 minutes. Flip and broil until golden in spots, 4 to 6 minutes.
Meanwhile, in a small bowl, toss together bread crumbs, Parmesan, anchovies, garlic, herbes de Provence or oregano, red-pepper flakes and 1/4 teaspoon salt. Add 2 tablespoons oil and use your fingers to rub oil, garlic and anchovies into the crumbs.
When zucchini is browned on both sides, turn off broiler and set oven to 500 degrees. Sprinkle zucchini with mozzarella, then bread crumb mixture; generously drizzle with oil. Bake until cheese melts and bread crumbs turn golden, about 4 minutes.
Grind black pepper over top and drizzle with more oil, if needed. Top zucchini with olives, basil and additional red-pepper flakes, if desired, and serve with lemon wedges for squeezing.