Buttermilk Fried Chicken Sandwich | Saveur

Ingredients

• 1 cup buttermilk
• Kosher salt and freshly ground black pepper, to taste
• 2 (4 oz.) boneless, skinless chicken breasts
• 2 ¹⁄₄ tsp. , plus 1/2 cup red wine vinegar
• 1 tsp. Dijon mustard
• 2 tbsp. olive oil
• 1 small red onion, thinly sliced
• 2 cups thinly sliced green cabbage
• 2 tbsp. minced parsley
• 2 jalapeños, stemmed, seeded, and thinly sliced
• 1 cup flour
• ¹⁄₂ tsp. cayenne
• Canola oil, for frying
• 2 ciabatta rolls, halved lengthwise