1 tablespoon butter
1 tablespoon olive oil
1 tablespoon all-purpose flour
4 ounces brie (rind removed, cubed)
2 tablespoons course bread crumbs (I used cornbread)
1 tablespoon truffle oil
1 teaspoon fresh thyme leaves (about 4 sprigs)
Preheat your oven to 350 degrees. Bring 4 quarts of water and 1/8 cup salt up to a boil in a large soup pot. Add the rigatoni and cook according to package instructions. While the pasta is cooking, melt butter in a 12-inch pan over medium heat. Add the olive oil, flour, nutmeg, garlic powder, crushed red pepper, and black pepper, and then whisk it constantly, cooking until nutty and fragrant (about 3 minutes). Slowly add the milk as you whisk to work out any lumps. Turn up the heat to medium-high while continuing to whisk until milk comes to a low boil and begins to thicken slightly (this could take about eight minutes). Reduce heat and slowly add 4 ounces of the cheddar and the brie to the milk mixture. Whisk until all of the cheese has melted into the sauce. Add the lemon zest. Temper the egg yolks by whisking two tablespoons of the cheese sauce into them then add the egg yolks to the mixture.