Leek and potato soup

3 tbsp coconut oil

4 celery sticks, finely chopped

4 garlic cloves, crushed

1 onion, finely chopped

4 leeks, trimmed and finely sliced

1 tsp fresh thyme leaves

5 potatoes, peeled and diced

600ml vegetable stock

300ml milk

salt and pepper

2 tbsp chopped chives