Clean seafood well, remove beard from mussels, tap the clams upside down to remove any sand, rinse a few time in cold water. Add them to a pan. Turn on the heat to medium. Cover with a lid. As they start to open, remove lid, add wine, shake and let it evaporate. Cover again until fully open

Drain them and leave to cool a bit. Meanwhile wash and chop mushrooms. When cooled, she'll about half if the fish, leave the rest with their shells

Cook garlic in olive oil. When brown, remove it and add mushrooms.

Cook mushrooms until they release their water. Add a Glug of white wine and let it evaporate. Now add stock and passata. Simmer on low to medium for about 5-6 mins. Then add the seafood, stir and simmer for another few minutes to heat through. Check for salt