Boil a pot of salted water and cook chickpea pasta according to package directions; reserve 2 tablespoons of pasta water before draining.
Season chicken breast with sea salt and black pepper, then sear in a pan with olive oil over medium-high heat until golden and cooked through.
Remove chicken to rest, then in the same pan, sauté minced shallots and sliced cremini mushrooms until they release their moisture and turn deeply browned.
Add minced garlic to the mushrooms and cook for 30 seconds until fragrant.
Slice the chicken into bite-sized pieces and return it to the pan along with the cooked pasta.
Stir in the Greek yogurt, reserved pasta water, and grated parmesan to create a light, creamy coating.
Remove from heat and drizzle with truffle oil, tossing well to distribute the aroma.
Garnish with chopped fresh parsley and serve immediately.