Lobster-Avocado Cocktail

Ingredients

• 1/3 cup fresh lime juice
• 2 tablespoons prepared horseradish, drained
• 2 tablespoons Worcestershire sauce
• 2 teaspoons honey
• 1 teaspoon Tabasco sauce
• 1 tablespoon chopped fresh tarragon
• Kosher salt and freshly ground black pepper
• 1 (2 1/2- to 3-pound) lobster, steamed and meat removed and diced
• 1/2 cup chopped watercress
• 1 ripe avocado, halved, pitted, and diced