shell the mussels and prawns, put aside any mussel juice and also the prawn shells and heads....de-vein the prawns and chop mussel meat in halves.
In a pot add the cream,stock, mussel juice , teaspoon of crushed garlic, prawn shells/heads , cracked pepper , cayenne pepper , bay leaf .Simmer on low for 10 mins...put through a sieve or colander to remove the prawn shells & heads. Put the broth back on the heat and add onions , and potatoes..simmer till potatoes are almost cooked. Add fish first and cook for 1min then prawns and cook for less than a minute...then add raw mussel meat cook for like 30 secs and remove from the heat and let it sit for a minute or 2.. the residual heat will cook the mussels through....its really a time thing when it comes to cooking seafood...different times for each ingredient, there's nothing worse than overcooked seafood :) I had some prawns and salmon left which I grilled with some garlic and butter and used as a garnish