Steps
1. Prepare the fennel by trimming the stalks and slicing the bulb thinly using a sharp knife or mandoline.
2. Peel the red orange and carefully segment it, removing any seeds.
3. Thinly slice the red onion.
4. In a salad bowl, combine the fennel slices, red orange segments, olives, and red onion.
5. Drizzle with extra virgin olive oil and red wine vinegar.
6. Season with salt and freshly ground black pepper to taste.
7. Gently toss all ingredients to combine.
8. Garnish with fresh mint leaves if desired.
9. Serve immediately or chill briefly to meld flavors.