I am planning to make Beef Wellington for Thanksgiving.
+1
The plan is to make it all the way up to rolling it in duxelle/parma ham (maybe crepes?) the night before and refrigerate, and only do the pastry part on the day of.
This should be fine. Stick with duxelle/parma.
How much tenderloin should I get?
We do 1 pound per person. More if we dry brine. Costco product should be fine. If you need help trimming, get it from a butcher and tip them for a trim.
If you have any favorite recipes, I would love to see it.
Start with Gordon Ramsay