Step 1: In a large mixing bowl, combine the diced bologna, celery, bell pepper, finely chopped onion, and diced sweet pickles. Gently stir everything together to ensure an even distribution.
Step 2: In a separate small bowl, whisk together the mayonnaise, mustard, and apple cider vinegar. Stir until smooth and well combined.
Step 3: Pour the prepared dressing over the bologna and vegetable mixture. Fold and stir everything thoroughly until all ingredients are evenly coated in the creamy dressing.
Step 4: Season the salad generously with salt and freshly ground black pepper to taste. Stir, taste, and adjust seasoning as needed, adding more tang with extra vinegar or mustard if desired.
Step 5: Cover the bowl with plastic wrap or transfer the salad to an airtight container. Refrigerate for at least 1 hour, or preferably longer (even overnight), to allow the flavors to deepen and meld.
Step 6: When ready to serve, give the salad a quick stir. Serve chilled as a side dish, sandwich filling, or with crackers. Enjoy your classic bologna salad!