400 g Fresh porcini mushrooms - sliced, or Chanterelle mushrooms
1 medium onion - diced
4 garlic cloves - sliced
2 medium carrots - diced small
½ celery stick - diced small
8 cm Leek - an 8 cm piece, diced small, diced small
1 large potato - diced small
1 tbsp olive oil
1 tsp butter
1.5 L vegetable stock
150 g uncooked penne pasta
100 ml double cream
1 bay leaf
Black pepper - to taste
Parsley - for garnish
1 tsp Yoghurt - optional, 1 tsp stirred into each bowl before serving, optional, mix in before serving