Fennel soup with salmon

Ingredients

• 1 large fennel bulb with fronds
• 1 large onion
• 1 medium-sized carrot
• 1 teaspoon fennel seeds
• 2 tablespoon oil
• 1 litre chicken or vegetable stock (see recipe tip)
• 2 potatoes, peeled and diced
• sea salt flakes and ground black pepper, to season
• sour cream, to serve (omit for dairy-free)
• 150 gram hot-smoked salmon