Add the fennel and cook until just edged with brown on both cut sides and beginning to soften, 1 to 2 minutes. Transfer to a bowl using tongs. Lower the heat to medium, sprinkle in the garlic, and cook for 1 minute, then add the favas and warm through, 1 to 2 minutes. 3. Scrape the fava beans and garlic into the bowl with the fennel. Add the scallions and vinegar, toss, and season with salt and pepper to taste. Serve warm or at room temperature. Sprinkle with the cilantro just before taking the dish to the table.