Mushroom and Chive Soup

Ingredients

• 5 cups vegetable stock
• 14 g dried porcini mushrooms
• 2 tsp olive or canola oil
• 1 shallot or small onion (finely chopped)
• 1 stalk celery (coarsely chopped)
• 224 g fresh mushrooms (trimmed and sliced)
• 1 tbsp fresh or frozen chives (chopped)
• 1/8 tbsp salt
• 1/8 tbsp black pepper
• 2 tbsp reduced-fat sour cream