Rachel Ray’s Ultimate Mac and Cheese | 12 Tomatoes

Ingredients

• 1 lb short-cut pasta, such as macaroni, penne or medium shells
• 1 tablespoon extra-virgin olive oil
• 8 slices bacon, chopped
• 1 small onion or 2 shallots, finely chopped
• 4 cloves garlic, finely chopped
• 4 tablespoons butter
• 3 tablespoons all-purpose flour
• 1 teaspoon dry mustard
• Fine black pepper or white pepper
• A pinch of nutmeg
• 3 cups whole milk, at room temperature or warmed
• 2 1/2 cups shredded Gruyere cheese or a combination of Gruyere and white cheddar
• 3 tablespoons freshly grated truffle (optional), white or black, and/or 2 teaspoons truffle-infused oil
• 1 cup freshly grated Parmigiano-Reggiano cheese
• 1/4 cup finely chopped chives and parsley