Spring Vegetable Bagna Cauda

Name: Spring Vegetable Bagna Cauda
Ingredients: 2 small heads fennel; 6 tiny artichokes; 4 small carrots; 1 small cauliflower; 1 Belgian endive; 2 small heads radicchio (or radicchio di Treviso); 8 small asparagus spears; 1 bunch baby turnips; 1 bunch multicolored radishes; 1 bunch spring onions; Handful peeled fava beans; Sea salt; 10 to 12 salt-packed anchovies; 6 cloves; Salt and pepper; 2 cups extra-virgin olive oil; 8 tablespoons (1 stick) unsalted butter; A few drops red wine vinegar; Lemon zest, optional