Rinse all canned beans under cold water for 30 seconds to remove excess sodium and starch, which prevents a cloudy appearance and reduces gas while improving the salad's texture and flavor clarity.

Prepare the salad at least 12-24 hours ahead and refrigerate; this allows the vinaigrette to penetrate all ingredients, creating a cohesive, deeply flavored dish that actually improves with time.

Use a 1:1 ratio of red wine vinegar to olive oil (rather than the traditional 1:3 vinaigrette) to achieve the signature tangy punch this classic salad demands without overwhelming the delicate beans.

Cut red onion, celery, and bell pepper into consistent ¼-inch pieces so they marinate at the same rate and create an evenly distributed, professional-looking salad.

Always taste the chilled salad just before serving and add fresh kosher salt and black pepper to taste, as flavors mellow during refrigeration and may need a final seasoning boost.