If I’m going to convince you to buy anything for your kitchen I hope it’s a gratin dish. It’s an amazing investment that will make you a more versatile cook, as you can “gratin” just about anything. Just pour some oil and/or cream over leftover vegetables, meat, or fish; top with bread crumbs and grated cheese; bake it in the oven; and voilà!, it’s a gratin. This one in particular takes kale and a can of beans and makes a near-certain crowd-pleaser for any group. The hero is most likely the crème fraîche, but the gratin dish helps, too (I promise, it’s worth it).