Bring a pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
Reserve one tablespoon of the starchy pasta water, then drain the pasta and set aside.
Season the chicken breast with sea salt and black pepper, then sear in a non-stick pan over medium-high heat until fully cooked through.
Remove the chicken from the pan and slice it into thin, bite-sized strips.
In the same pan, sauté the sliced mushrooms and minced garlic until the mushrooms are tender and golden brown.
Reduce the heat to low and stir in the Greek yogurt, truffle oil, and reserved pasta water to create a smooth, creamy sauce.
Return the chicken and pasta to the pan, tossing gently to coat every ingredient in the truffle sauce.
Garnish with fresh chopped parsley and serve immediately while hot.