Crudités with Creamy Pistachio Dip

Name: Crudités with Creamy Pistachio Dip
Ingredients: 1 ½ cups raw, unsalted shelled pistachios (7 ounces); 1 large shallot (minced); ¼ cup Champagne vinegar or white wine vinegar; 1 cup mayonnaise; 2 tablespoons fresh lemon juice; 1 large garlic clove (minced); ½ cup extra-virgin olive oil; 2 cups crème fraîche; ¼ cup minced flat-leaf parsley; 2 tablespoons minced tarragon; Salt and freshly ground pepper; 10 large Belgian endives preferably red and green varieties, separated into leaves, or very thinly sliced black radishes