Bring a large pot of salted water to a boil and cook the linguine according to package instructions until al dente.
Reserve 2 tablespoons of the pasta cooking water, then drain the noodles and set aside.
While the pasta cooks, dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat and sauté the chicken until golden and cooked through, approximately 5-6 minutes.
Remove the chicken from the skillet and set aside on a plate.
In the same skillet, add the sliced cremini mushrooms and cook until they are browned and tender, about 4-5 minutes.
Add the minced garlic to the mushrooms and sauté for 1 minute until fragrant.
Lower the heat and return the chicken to the skillet along with the cooked linguine and reserved pasta water.
Drizzle the truffle oil over the mixture and toss everything together until the pasta is glossy and well-coated.
Garnish with grated parmesan cheese and freshly chopped parsley before serving.