Very easy!
You can order the Foie Mousse from
http://www.dartagnan.com/ or make your own Liver Pate ( 1# liver-1qt of cream in a HS blender -White pepper & salt to taste) there might be a recipe in the GG thread for that pate. Bake at 350^F until firm-ish to the touch. Let cool before using
1.Sear the filet on all sides
2.when cool, Paint the Pate on the filet
3.Wrap in Puff pastry. ( local Bakery)
4. Paint the puff pastry with an egg wash.
Bake @ 375^F for 20 minutes, or until the puff pastry turns golden brown.