Remove the carrot tops and peel the carrots. Cut them into 3-inch lengths, then use a manual vegetable slicer to shave them lengthwise into ribbons. Cut off the stalks and fronds from the fennel bulbs if still attached, then halve the bulbs. Remove the outer layer, which is usually tough. Shave the fennel lengthwise like the carrots. Put the carrots and fennel in a bowl and toss with the olive oil, lemon juice, and 1 tablespoon vinegar. Let stand for 20 minutes to soften. Add the red onion, tangerine sections, and watercress. Season with salt and pepper, toss well, taste, and add more vinegar if needed. Serve immediately. |