Caramelized Onions Recipe with Thyme and Rosemary

Ingredients

• 3 lb (1.36 kg) yellow onions
• cooking spray, as needed
• 1.5 tbsp olive oil
• 1 tsp dried thyme, crushed
• 1 tsp dried rosemary, crushed
• 0.5 tsp salt
• 1 tsp freshly ground black pepper