-
1
Preheat the oven to 375.
-
2
Lightly butter a 9-by-13-inch baking dish.
-
3
On a large rimmed baking sheet, toast the baguette cubes for about 15 minutes, tossing once halfway through, until lightly golden and dry.
-
4
Transfer the bread to a large bowl.
-
5
In a very large skillet, melt 4 tablespoons of the butter.
-
6
Add the onion and celery and cook over moderate heat until softened, about 8 minutes.
-
7
Add the sage and thyme and cook until fragrant, about 1 minute.
-
8
Scrape into the bowl with the bread and wipe out the skillet.
-
9
Melt the remaining 4 tablespoons of butter in the skillet.
-
10
Add the mushrooms and cook over moderately high heat until tender and browned, about 8 minutes.
-
11
Season with salt and pepper.
-
12
Scrape the mushrooms into the bowl with the bread.
-
13
In a medium bowl, whisk the chicken broth with the egg.
-
14
Pour over the bread mixture and add 2 teaspoons of kosher salt and 1/2 teaspoon of pepper.
-
15
Toss until the bread soaks up the liquid.
-
16
Scrape into the prepared baking dish and cover with foil.
-
17
Refrigerate for at least 1 hour or overnight.
-
18
Preheat the oven to 375.
-
19
Bake the stuffing for about 30 minutes, until it is hot throughout.
-
20
Remove the foil and bake for about 30 minutes longer, until the top is lightly golden.
-
21
Serve hot or warm.