Invite friends over for a leisurely supper on Sunday. Our menu is designed for easy entertaining, with do-ahead recipes that showcase the fresh flavors of spring. The main course features a boneless pork shoulder braised with onion, fennel and celery. You simply brown the meat and combine all the ingredients in a slow cooker, then the meal cooks itself. For a delicious accompaniment, serve our summer squash gratin, which is baked until bubbly and golden brown. End the meal with strawberry parfaits: The berries, which get a flavor boost from black pepper and balsamic vinegar, are layered with rich vanilla ice cream.