Pork Chops with Cider Leeks

Name: Pork Chops with Cider Leeks
Ingredients: 4 bone-in pork chops (1/2 to 3/4 inch thick; about 8 ounces each); 1 teaspoon fennel seeds, lightly crushed; Kosher salt and freshly ground pepper; 2 tablespoons unsalted butter; 6 wide strips lemon zest (removed with a vegetable peeler), plus 1 tablespoon juice; 3 cloves garlic, smashed; 2 sprigs rosemary; 2 large leeks (white and light green parts only), halved lengthwise and cut into 1- to 1 1/2-inch pieces; 1 bulb fennel, sliced 1/4 to 1/2 inch thick, fronds chopped; 1 cup apple cider; 2 tablespoons extra-virgin olive oil