1 cup Kalamata olives, pitted 1 Calabrian chile, chopped 1 clove garlic, plus 3 cloves garlic, sliced thinly 1 tablespoon capers, chopped 1 tablespoon finely chopped fresh oregano 1/2 cup olive oil, plus 1/4 cup 1 teaspoon black pepper, plus 1 teaspoon 1 (5 to 6-pound) leg of lamb 8 small sprigs rosemary 1 tablespoon…