Truffle Tagliatelle

Ingredients

• • 1/2 lb (225 g) tagliatelle (or fresh pasta of your choice)
  • 1 tablespoon (15 ml) truffle paste (see note)
  • 1/4 cup (60 ml) unsalted butter
  • 1/2 cup (125 ml) grated Parmigiano-Reggiano cheese
  • 3 tablespoons (45 ml) mascarpone cheese
  • Thin slices of fresh black truffle (optional)
  • Salt and pepper