Skillet Chicken with Mushrooms and Caramelized Onions: A One-Pan Wonder for Every Occasion - Votra I

Ingredients

• 2 tbsp olive oil
• 2 tbsp sherry vinegar
• 2 tbsp honey
• 1 tbsp Dijon mustard
• ¼ tbsp red-pepper flakes
• 1 tbsp kosher salt
• 1 lbs ½ boneless, skinless chicken thighs
• 2 medium yellow onions, thinly sliced
• ¾ lbs cremini mushrooms, stems removed and thinly sliced
• 3 tbsp olive oil
• ½ cup fresh flat-leaf parsley or dill, roughly chopped
• ¼ cup grated Parmesan or pecorino