Bring a pot of salted water to a boil and cook the chickpea pasta according to package directions, reserving 2 tablespoons of pasta water before draining.
While pasta cooks, dice the chicken breast into bite-sized pieces and season with half of the sea salt and black pepper.
Heat olive oil in a large skillet over medium-high heat and sauté the chicken until golden and cooked through, then remove from the pan and set aside.
In the same skillet, add the sliced mushrooms and cook until they release their moisture and turn golden brown.
Add the minced garlic to the mushrooms and sauté for 30 seconds until fragrant.
Lower the heat to low and return the chicken to the pan along with the cooked pasta.
In a small bowl, whisk together the Greek yogurt and reserved pasta water until smooth, then pour over the pasta mixture.
Toss everything together gently until the sauce is creamy and coats the pasta, being careful not to boil the yogurt.
Remove from heat and stir in the truffle oil, parmesan cheese, and remaining salt and pepper.
Garnish with fresh chopped parsley and serve immediately.