Slow Cooker Lamb Shepherd’s Pie

Ingredients

• 1 kg lamb shoulder (boneless, diced into large pieces)
• 3 carrots (medium, finely diced)
• 4 celery sticks (finely diced)
• 1 brown onion (large, finely diced)
• 4 cloves garlic (finely chopped)
• 3 sprigs thyme
• 1 sprig rosemary
• 3 tablespoons tomato paste
• 2 tablespoons worcestershire sauce
• 3 cups beef stock
• 2 cups frozen peas
• 2 cups frozen corn
• sea salt & cracked black pepper
• 1 kg potatoes (peeled & chopped in half)
• 50 g butter
• 1/2 cup milk (warmed)
• 1/2 cup parmesan cheese (grated)