Panera Bread Green Goddess Cobb Salad

Name: Panera Bread Green Goddess Cobb Salad
Prep time: 10 min
Cook time: 10 min
Total time: 20 min
Cuisine: American
Ingredients: 1 cup sliced red onion; 1/2 cup white vinegar; 1 tablespoon sugar; 1 1/2 teaspoons salt; 1 cup warm water; 6` ounces salad blend (use arugula, romaine, kale, and raicchio blend); 6 ounces grilled chicken breast; 2 tablespoons crisply cooked bacon; 3 tablespoons chopped avocado; 1/2 cup chopped tomatoes; 1 hard boiled egg (cut in half); 2 tablespoons feta (cheese); 2 tablespoons pickled onions; 1 cup mayonnaise; 2 tablespoons tarragon leaves; 3 tablespoons minced chives; 1 cup flat leaf parsley; 1 cup packed watercress (cleaned and tough stems removed); 2 tablespoons lemon juice; 1 tablespoon champagne vinegar; 1/2 teaspoon salt; 1/4 teaspoon pepper