Well, Quizzie - if
" you mean Pappadeaux's - and by "Red Snapper with a Ponchartrain Sauce" you mean "Pappadeaux Snapper Ponchartrain" ... it took me longer to figure out which Houston area "Pappa's" you might be talking about than to find the Pappadeaux recipe
There are several recipes - both for cooking the fish (baked, broiled, fried, blackened), and for the sauce. Easy Google search matches include Red Snapper Ponchartrain
, spelling variant Red Snapper Pontchartrain
, and for the sauce by itself there is Ponchartrain sauce
and Pontchartrain sauce
Hope you can find what you're looking for somewhere in these links.
(Excuse my confusion - I found listings for a Papa's Seafood, Pappa's Seafood, and Pappadeaux referred to as Pappa's)