Set aside. Bring 5-6 qt. of water to a boil in a large kettle. To make the clam sauce: In a large skillet, heat olive oil and butter. Add onion and sauté for 3 minutes. Add oregano and garlic. Cook ...
4. Add flour and stir until a roux is created. 5. Add clam juice and fish stock and bring roux to a simmer. 6. Add diced potatoes. 7. Add mussels and cover. 8. Steam mussels just until they open.