OKAY, I found I needed more mayo so I used about 5 TBSP. and I like mine a bit on the seasoned side, so I added some onion powder and a couple TBSP of fresh chopped parsley.
I did not use the marinara on this. I took a can of condensed cream of celery (because I was out of cream of mushroom) and heated it in a small saucepan along with some dry white wine and skim milk (sorry didn't measure, just watched for the consistency I like) and added some pepper, onion powder and parsley to that. Served it with the croquettes and it was very good, if I do say so myself.
The croquettes were good but you may want to add the seasoneing you like. Next time I will try to add a little water or and few drips of egg whites rather than the extra mayo (damned calories)