Ingredients for about 8-10 people

• 1 pound elbow macaroni
• 1 quart milk
• 1 stick unsalted butter
• 1 tablespoon kosher salt
• ½ cup all-purpose flour
• 12 ounces Gruyère, grated
• 8 ounces Extra-sharp Cheddar, grated
• ½ teaspoon freshly ground black pepper
• ½ teaspoon ground nutmeg
• 2 tablespoons white truffle oil (optional)
• ⅓ pound lardons or cubed, smoked bacon
• 1.5 fresh white bread crumbs (5 slices, crusts removed)
• vegetable oil

Preparation

1. Preheat oven to 375°F.
2. Drizzle oil into a large pot of boiling salted water. Add macaroni and cook according to package directions; drain well.
3. Meanwhile, heat milk in a small saucepan, but don't boil. Melt 6 tablespoons of the butter in a large (4-quart) pot and add flour. Cook over low heat for 2 minutes, stirring with a whisk. Add hot milk, whisking, and cook 1-2 minutes, until thickened and smooth. Remove from heat and add Gruyere, cheddar, 1 tablespoon salt, pepper, and nutmeg. Add cooked macaroni and stir well. Stir in truffle oil and chopped bacon and pour into a 3-quart baking dish.
4. Melt the remaining 2 tablespoons butter, combine with fresh bread crumbs, and sprinkle on top. Bake 30-35 minutes, or until the sauce is bubbly and the top is browned.