Truffle Mac and Cheese

Ingredients

1.5lb dried rigatoni (we like Deccico) 
2 tablespoons unsalted butter
1 small Vidalia onion 
1 quart heavy cream 
1 ounce Sabatino Tartufi Truffle Oil 
10 ounces shredded mozzarella, divided
4 ounces grated Parmesan 
4 ounces Gorgonzola 
4 ounces ricotta 
2 teaspoons garlic powder 
1 teaspoon Sabatino Tartufi Truffle Salt 
1 teaspoon salt
1 teaspoon Pepper 
Sabatino Tartufi Truffle Zest®, to garnish

Directions

1. Preheat oven 400˚F. 
2. Bring a large pot of salted water to a boil over high heat and boil the pasta for about 7 minutes, or until al dente. Strain and set aside.
3. In a large sauce pot over medium-low heat, sweat the onions with the butter until translucent, about 5 minutes. 
4. Pour in the cream and truffle oil, and stir in 5 ounces of mozzarella and all of the other cheeses, making sure to reserve 5 ounces of mozzarella for later. Sprinkle in the garlic powder, salt, and pepper. Stir to combine everything. 
5. Once the ingredients have created a sauce, toss to coat in the pasta. 
6. Transfer to a baking dish, sprinkle evenly the remaining mozzarella cheese on top, and bake for approximately 10 minutes, or until the top is golden brown.
7. Remove from oven, and sprinkle some Truffle Zest® on top, to taste.