French Onion Chicken

Ingredients (13)

• 1 tbsp olive oil
• 2 lbs chicken breasts
• 1/2 tsp kosher salt
• 1/2 tsp ground black pepper
• 2 tbsp butter
• 2 lbs yellow onions
• 1/2 tsp salt
• 1/8 tsp red pepper flakes
• 3 tbsp flour
• 1½ cups beef stock
• 1/2 tsp dried thyme leaves
• 8 slices Swiss or provolone cheese
• 2 tbsp chopped chives for garnish