Strawberry–Chicken Salad Tea Sandwiches

Name: Strawberry–Chicken Salad Tea Sandwiches
Cuisine: American
Ingredients: 12 slices firm white sandwich bread, such as Pepperidge Farm Farmhouse Style; 2½ cups chopped cooked chicken, pulled from a rotisserie chicken; 1 cup chopped strawberries; ½ cup chopped toasted pecans; ⅓ cup chopped celery; ¼ cup chopped green onion; 1 (11-ounce) can mandarin oranges, drained and chopped; 1 recipe Poppy Seed Dressing (recipe follows); Garnish: sliced strawberries; ½ cup mayonnaise, such as Hellman’s; 1 tablespoon champagne vinegar*; 2 teaspoons poppy seeds; 2 teaspoons sugar; ¼ teaspoon salt; ⅛ teaspoon ground black pepper