Roasted Leg of Lamb Stuffed with Apple and Rosemary

Ingredients

• 3 tbsp vegetable or canola oil (divided)
• 3 tbsp onion (peeled and finely diced)
• 1/4 tsp salt
• 1 1/4 tsp freshly ground black pepper (divided)
• 1 cup apple ((like Ambrosia, Honey Crisp or Golden Delicious), peeled, cored and diced)
• 1 tbsp cider vinegar
• 2 1/2 lb boneless leg of lamb (trimmed)
• 2 tbsp fresh rosemary (roughly chopped)
• 1 tbsp fresh thyme leaves
• 2 tsp coarse sea salt