Chef’S Spinach Salad

Ingredients

• 1 small red onion, thinly sliced
• 2 tablespoons white wine vinegar
• 1 teaspoon sugar
• 1 package (6 ounces) fresh baby spinach
• 1 cup quartered cherry tomatoes
• 1 cup fresh or frozen corn, thawed
• 4 ounces fully cooked lean ham, cut into thin strips
• 4 ounces sliced cooked turkey, cut into thin strips
• 1 piece (2 ounces) reduced-fat cheddar cheese, cut into thin strips
• 1/2 cup buttermilk
• 2 tablespoons minced chives
• 1 tablespoon reduced-fat mayonnaise
• 2 teaspoons white wine vinegar
• 2 teaspoons Dijon mustard
• 1/4 teaspoon minced garlic
• 1/4 teaspoon salt
• 1/4 teaspoon pepper