Cottage Pie

• 1 tbsp extra virgin olive oil
• 1 carrot, diced
• 1 brown onion, diced
• 3 cloves garlic, crushed
• 400 g porcini mushrooms, sliced
• 100 g dried mushrooms, diced
• 2 sprigs thyme
• 2 tbsp tomato paste
• 2 tbsp plain flour
• 2 cup vegetarian stock
• 1 tbsp balsamic vinegar
• 1 cup peas, frozen
• 4 large sweet potatoes, peeled and diced
• .5 cup milk