Mac and Cheese with Roasted Poblano Chiles

Kara and I have been looking for quite some time for a good mac and cheese recipe. I think we finally found it - we loved this dish! Even though this is a slightly spicy recipe, variations should be pretty easy. The hardest part of the recipe was timing everything - I'd suggest doing the peppers first, and putting the noodles in to cook about when you start the Bechamel sauce.

Mac and Cheese
3 Tbsp unsalted butter
3 large fresh poblano chiles
Sea salt
1 lb dried pasta
4 cups hot Bechamel sauce (recipe included)
8 oz sharp white cheddar, grated
8 oz sharp orange cheddar, grated
8 oz Parmigiano-Reggiano or Asiago, grated
1/2 tsp cayenne pepper
1/2 tsp Hungarian paprika
1/2 tsp dry mustard
1/2 tsp Tabasco sauce
1/2 c breadcrumbs

Bechamel sauce
6 Tbsp unsalted butter
1/3 c unbleached all-purpose flour
4 c whole milk, heated till steaming
1/2 tsp sea salt
1/2 tsp grated nutmeg

Peppers:
Lay chiles on the sides on a gas burner and turn flame on high. Roast chiles, turning with tongs, until skins are evenly charred, about 10 minutes. (We put them in the oven on high broil).
Steam until cool in a closed paper bag (we put them in a covered bowl), about 15 minutes. Under cold running water, rub off burned peel. Then discard stems, core and devein chiles, scraping away all seeds, and cut into long thin strips.

Pasta:
Bring a large pot of salted water to a boil. Add pasta and cook according to instructions on package until just tender. Drain pasta and transfer to a large bowl (do not rinse) and toss with butter.

Bechamel Sauce:
Melt 6 tablespoons butter over low heat. Whisk in flour and cook, whisking often, without allowing flour to brown, about 4 minutes. Remove pan from heat and whisk in hot milk. Add salt and nutmeg (and black pepper, if desired). Return to medium heat and bring to simmer. Continue to cook, stirring with a wooden spoon, until sauce has thickened to texture of melted ice cream, about 10 minutes.
Add cayenne, paprika, mustard, and Tabasco to sauce.
Stir all but one cup of the grated cheeses into the bechamel sauce. Heat, stirring until cheese just melt and sauce is smooth.

Pour the sauces over the pasta in the bowl. Add chiles and stir. Spoon into a buttered 9x13 baking dish . Top with remaining cheese and breadcrumbs.

Bake at 400 until pasta is heated through, sauce is bubbling, and top is browned, about 20 minutes. Remove from oven and let stand on a rack for 5 minutes. Serves 8.