Passover Lamb with Pickled Cherries

Ingredients

• 1 cup apple cider vinegar
• 1 cup packed light brown sugar
• 1 cup water
• One 2-inch piece of fresh ginger, peeled and thinly sliced
• 6 garlic cloves, crushed
• 1 jalapeño, thinly sliced crosswise
• 1 tablespoon mustard seeds
• 1 small cinnamon stick
• 1 star anise pod
• 1 bay leaf
• 1 pound Bing cherries, pitted
• 1/4 cup extra-virgin olive oil
• 2 tablespoons minced garlic
• 2 tablespoons minced rosemary
• 2 tablespoons minced thyme
• One let of lamb, roughly 4 1/2 pounds, at room temperature (aitch bone removed)
• Kosher salt
• Pepper