Fennel becomes sweet and caramelized in this simple holiday side dish.
Preheat oven to 450 degrees, with rack in lower third. In a medium bowl, toss green beans with 1 tablespoon oil. On a rimmed baking sheet, toss fennel wedges with remaining tablespoon oil and season with salt and pepper; arrange in a single layer. Roast 15 minutes, then flip fennel and add green beans to sheet. Roast until beans are crisp-tender, 12 to 15 minutes. To serve, transfer to a serving platter, drizzle with orange juice, and top with almonds, orange zest, and fennel fronds.
To keep the beans bright green and slightly crisp, add them to the baking sheet halfway through the roasting time.