By starting with trout that have already been boned and butterflied, you can focus on roasting this rich, flavorful fish and creating a complementary side dish. Adding the trout to a preheated baking sheet in the oven ensures that it will develop a nice crisp skin. Given the trout’s brief roasting time, it is partnered with an equally quick accompaniment: creamy cannellini beans tossed with the bright, fresh flavors of shallots, parsley, lemon juice, capers, rosemary, and garlic. Cannellini beans work well in this salad, but any small white beans will work.
