"The original recipe calls for halibut which is hard to find for me (and a bit too expensive when I can find it) so while it would be delicious, I found that other mild white fish (thick fillets) work great, like these hake fillets I found at Costco. Also, I increased some components (not all) of the recipe to feed more than 4 since my family is larger than that, but you could decrease the amounts in the sauce and the number of fish fillets if you want to serve less - be adventurous, play around; this recipe is very forgivable...."