Step 1: Cook and Prepare the Chicken: If using raw chicken, poach or bake chicken breasts until fully cooked (internal temperature reaches 165F or 74C). Let cool slightly, then shred or dice into bite-sized pieces. For a richer flavor, chicken thighs can be used instead.
Step 2: Combine Ingredients: In a large bowl, combine the shredded or diced chicken, mayonnaise, diced celery, halved red grapes, finely diced red onion, and sweet pickle relish.
Step 3: Add Seasoning: Add the chopped fresh parsley, Dijon mustard, salt, and black pepper to the bowl.
Step 4: Mix Gently: Gently mix all ingredients until well combined, ensuring the chicken and vegetables are evenly coated in the creamy dressing. Be careful not to overmix, as this can make the chicken salad mushy.
Step 5: Chill: Cover the bowl with plastic wrap and refrigerate for at least 30 minutes to allow the flavors to meld. Chilling enhances the taste and texture of the salad.
Step 6: Serve: Serve the Southern chicken salad on croissants, lettuce wraps, or with crackers. It can also be enjoyed as a topping for a green salad.
Optional Tips: For a tangier flavor, add a squeeze of lemon juice. To add a nutty crunch, mix in 1/4 cup of chopped pecans or walnuts. If sweet pickle relish is unavailable, finely diced sweet pickles can be used as a substitute.