Legal's Inaugral Fish Chowder

• 12 concentrated fish stock
• 2 cod
• 1 monkfish
• 1 cusk
• 1 cheese
• 1/2 monterey jack (finely grated)
• 475 ml cream (light)
• 350 gr onions (diced)
• 350 gr chowder fish fillets
• 110 gr butter