Instant Pot Dijon Chicken

Ingredients (10)

• ½ cup chicken stock
• ¼ cup dry sherry
• 2 tbsp Dijon mustard
• 2 garlic cloves
• 1 tsp dried thyme leaves
• ½ tsp Kosher salt
• ½ tsp freshly ground black pepper
• 2 tbsp unsalted butter
• 1 medium yellow onion
• 3 boneless, skinless chicken breasts