Apple- Endive Salad with Sugared Walnuts

Bahan-bahan (6 porsi)

• 2 tablespoons white wine vinegar
• 1 tablespoon red wine vinegar
• 1/2 teaspoon Dijon mustard
• 1/4 teaspoon granulated white sugar
• 2 tablespoons extra virgin olive oil
• 1 small shallot, (minced)
• 1/8 teaspoon salt
• freshly ground black pepper, (to taste)
• 2 tablespoons unsalted butter
• 1 cup walnuts, (chopped coarsely)
• 1/2 teaspoon granulated white sugar
• 2 large Belgian endive
• 2 medium Granny Smith apples
• 1/2 cup blue cheese crumbles
• 2 tablespoons chopped fresh tarragon leaves
• freshly ground black pepper, (to taste)