Three-Bean Salad is a vibrant, tangy, and slightly sweet side dish that has graced countless potlucks, barbecues, and family dinners. Combining the crispness of green and wax beans with the hearty texture of kidney beans, it’s both satisfying and refreshing. Thinly sliced onion adds a zesty bite, while the dressing—a blend of white vinegar, sugar, vegetable oil, and a hint of celery seed—delivers the perfect balance of sweet and tangy flavors.This salad requires minimal preparation and is best made ahead, allowing the beans to marinate and absorb the delicious dressing. It’s a versatile dish that complements grilled meats, sandwiches, or can be enjoyed as a light stand-alone meal. Whether you're hosting a party or looking for an easy weeknight side, this Three-Bean Salad offers nostalgic flavors with a modern twist.