Australian Saltbush Lamb

Name: Australian Saltbush Lamb
Cuisine: European
Ingredients: 1.2 kg saltbush lamb leg or shoulder; 3 garlic cloves, minced; 2 tbsp fresh rosemary, finely chopped; 2 tbsp olive oil; 1 tbsp lemon juice; Salt and black pepper to taste; 1 cup chicken or vegetable stock; 500g baby potatoes; 300g carrots, peeled and cut into chunks; 1 sprig fresh thyme (optional, for garnish)