Green Beans with Sweet-and-Sour Bacon Dressing

INGREDIENTS

• 1/2 lb. thick-cut bacon, cut crosswise into 1/8-inch strips
• 1/2 yellow onion, finely minced
• 1 cup apple cider vinegar
• 1 cup sugar
• 1 cup chicken stock
• Kosher salt and freshly ground pepper, to taste
• 3 lb. green beans, trimmed