Spring Green Salad

Name: Spring Green Salad
Ingredients: ¼ cup plain whole-milk Greek yogurt; ¼ cup fresh lemon juice (from 2 lemons); 1 teaspoon kosher salt; ½ teaspoon freshly ground black pepper; 1 anchovy fillet; 2 ripe avocados, peeled and pitted, divided; ½ cup chopped fresh chives, divided; 4 tablespoons chopped fresh mint, divided; 2 romaine hearts, chopped; ½ English cucumber, chopped; 1 cup sugar snap peas, halved; ½ cup frozen shelled edamame, thawed; ⅓ cup shelled roasted salted pistachios, chopped