Cook the chickpea linguine in boiling salted water according to package directions, reserving two tablespoons of the cooking liquid.
Season the chicken breast with half of the sea salt and black pepper.
Heat the olive oil in a skillet over medium-high heat and sauté the chicken until golden and cooked through, then slice into thin strips.
In the same skillet, sauté the sliced cremini mushrooms and minced shallot until the mushrooms are tender and browned.
Stir in the minced garlic and cook for thirty seconds until the aroma is released.
Add the cooked linguine, sliced chicken, and reserved pasta water to the skillet, tossing to combine.
Drizzle the truffle oil over the pasta and sprinkle with the parmesan cheese, tossing again to coat.
Garnish with fresh parsley and the remaining sea salt and black pepper before serving.