Pumpkin Beer and Mushroom Mac and Cheese

http://tideandthyme.com/porcini-and-pumpkin-ale-mac-cheese/

Porcini and Pumpkin Ale Mac & Cheese
1 oz. dried porcini mushrooms
1 cup cremini mushrooms, chopped
1 shallot, finely diced
1 clove garlic, minced
1 pound (16 oz.) small pasta shape, such as shells
6 Tbsp. butter
3 Tbsp. flour
2 1/2 cups milk
1/2 cup Pumpkin ale (such as Dogfish Head’s Punkin Ale)
1/2 tsp. salt
2 cups sharp white cheddar cheese, shredded
1 cup Fontina cheese, grated
1 cup breadcrumbs or panko
kosher salt
Boil water and 1 tbsp kosher salt in a large stockpot. Once boiling, add pasta and cook for 5 minutes. Drain, rinsing pasta with cold water, and set aside until ready to use.
Place the dried mushrooms in a microwavable-safe bowl and cover with water. Cook on high for 30 seconds, and let sit and rehydrate for 10 minutes. Strain, and rougly chop.
In a large saucepan over medium-high heat, melt 6 tablespoons of the butter. Add the cremini mushroom and shallot, and saute for about 3 minutes, until starting to brown on the edge. Add the garlic, and cook until fragrant, about 30 seconds. Add the flour, and let cook, stirring constantly for about 3 minutes. Slowly whisk in the beer, as well as the milk, scraping the bottom of the pan to release any browned bits. Cook over medium heat, whisking constantly, until mixture thickens. Add in cheese and chopped porcini mushrooms, and stir to combine. Season to taste with salt and pepper.
Add pasta to the saucepan with the cheese sauce, and mix to combine. Place in 2 quart cassarole dish, sprinkle the breadcrumbs on the top, and bake for 1 hour or until browned and bubbly.