Fish Fillets with Leeks and Coriander

2 lbs raw fish fillets or steaks
1 c fish stock
1 c boiled white wine
1 T olive oil
1 c sliced leeks
1 t coriander
1/2 t ground pepper
1/2 t celery seed (or lovage)
1/2 t oregano
2 raw egg yolks

Take fish filets, chop into pieces, and put into a pot. Add stock, boiled wine, olive oil and leeks. Bring to a boil, then simmer over low heat. Mean while grind together coriander, pepper, celery seed (or lovage), and oregano. Add these seasonings to the stew. Thicken the liquid by adding well beaten yolks little by little. Simmer for 10 minutes. Serve with a sprinkling of pepper.