Double Mustard–Marinated Chicken Drumsticks | Chicken | Umami

Ingredients

• 1/4 c. whole-grain mustard
• 1/4 c. apple juice
• 2 tbsp. white wine vinegar
• 1 tbsp. olive oil
• Pepper
• 1 medium yellow onion, sliced into 1/2-inch-thick rounds
• 1 medium red onion, sliced into 1/2-inch-thick rounds
• 12 small drumsticks (about 21/2 pounds)