Bring a medium pot of salted water to a boil and cook the chickpea linguine according to package directions until al dente.
While the pasta cooks, season the chicken breast with half of the sea salt and black pepper.
Heat a non-stick skillet over medium-high heat and sear the chicken for 5-6 minutes per side until fully cooked, then set aside to rest before slicing into strips.
In the same skillet, add the sliced cremini mushrooms and sauté for 4 minutes until they release their moisture and begin to brown.
Add the minced garlic and finely chopped shallot to the mushrooms, sautéing for another 60 seconds until fragrant.
Deglaze the pan with the chicken broth, scraping up any browned bits from the bottom.
Drain the pasta, reserving a splash of pasta water, and add the linguine to the skillet with the mushrooms.
Toss the pasta with the sliced chicken, truffle oil, grated parmesan, and the remaining salt and pepper.
Garnish with freshly chopped parsley and serve immediately while the truffle aroma is most potent.