Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
Before draining the pasta, reserve approximately 1/4 cup of the starchy cooking water.
While the pasta cooks, season the chicken breast with half of the sea salt and pepper, then sear in a non-stick skillet over medium-high heat until cooked through.
Remove the chicken from the skillet, let it rest for a few minutes, and then slice it into bite-sized strips.
In the same skillet, add the sliced cremini mushrooms and sauté until they release their moisture and begin to brown.
Add the minced garlic to the mushrooms and cook for 1 minute until fragrant.
Reduce the heat to low and whisk together the Greek yogurt and reserved pasta water in a small bowl until smooth.
Add the cooked pasta, sliced chicken, and yogurt mixture to the skillet, tossing gently to coat everything in the creamy sauce.
Remove from heat and drizzle with the black truffle oil, then garnish with fresh parsley and the remaining salt and pepper.