Best-Ever Tuna Salad

Ingredients (13)

• ½ cup red onion
• ½ cup apple cider vinegar
• 2 5 oz. can albacore tuna in water
• 1 cup dried cranberries
• 2 celery ribs
• 1 3.5 oz. jar capers
• 2 tbsp dill
• 1 tbsp parsley
• ¾ cup mayonnaise
• 1 large lemon
• 1 tbsp Dijon mustard
• 1 tsp Kosher salt
• Freshly ground black pepper