Shrimp Salad Recipe

Name: Shrimp Salad Recipe
Ingredients: 4 tablespoons (½ stick) unsalted butter, softened; plus more for the pan; 1 cup champagne vinegar; 2 tablespoons minced shallots; 1/3 cup heavy cream; kosher salt; cayenne pepper; 20 large shrimp (16- to 20-count), shelled and deveined; 12 ounces (about 8 cups) mixed greens; 1/2 cup peeled and diced fresh tomatoes; 2 avocados, halved; pitted; peeled; and thinly sliced; 4 large white mushroom caps, thinly sliced; 2 tablespoons snipped chives, for garnish; 2 tablespoons truffle juice; 2 tablespoons soy sauce; 2 tablespoons fresh lemon juice; 6 tablespoons extra-virgin olive oil; 1/4 teaspoon freshly ground black pepper