Three-Bean Salad, sans Biz | Saveur

Ingredients

• 1⁄2 cup white vinegar
• 1⁄4 cup sugar
• 1 tsp. dry mustard
• 3⁄4 tsp. celery seed
• 1⁄4 cup canola oil
• 2 ribs celery, chopped
• 1 green bell pepper, cored, seeded, and chopped
• 1 red onion, sliced
• 1 (15-oz.) can kidney beans
• 1 (14.5-oz.) can green beans
• 1 (14.5-oz.) can wax beans
• Salt and freshly ground black pepper