San Francisco Seafood Casserole

• 18 clams
• 1 mussels
• 1 onion (diced)
• 1 clov garlic (minced)
• 525 gr ca tomatoes
• 230 ml bot clam juice
• 210 gr cod
• 190 gr tomato paste
• 180 ml wine (white)
• 120 gr shrimp