INGREDIENTS
2 1/2
lbs Beef tenderloin, center cut
2 cups
Mushrooms
1
Onion, finely chopped (about 1/2 cup), medium
1
Egg
2 tbsp
All-purpose flour
1/2 tsp
Black pepper, ground
1/2
Of a 17.3-ounce package puff pastry sheets (1 sheet)
1 tbsp
Butter
1 tbsp
Water