Steps
1. Cook macaroni pasta according to package instructions.
2. In a saucepan, heat the heavy cream over medium heat.
3. Add the cheddar, Gruyere, and Parmesan cheeses to the cream, stirring until melted.
4. Stir in the truffle oil and season with salt and pepper.
5. Combine the cooked pasta with the truffle cheese sauce.
6. Serve hot, garnished with chopped fresh chives.