Bring a pot of salted water to a boil and cook the chickpea pasta according to package directions, reserving 1/4 cup of pasta water before draining.
While the pasta cooks, heat the avocado oil in a large skillet over medium-high heat and add the diced chicken breast, seasoning with sea salt and black pepper.
Cook the chicken until golden and cooked through, then remove it from the pan and set it aside.
In the same skillet, add the sliced cremini mushrooms and minced garlic, sautéing until the mushrooms are tender and browned.
Lower the heat to medium-low, then return the chicken to the pan and stir in the Greek yogurt, parmesan cheese, and reserved pasta water to create a smooth sauce.
Add the cooked pasta to the skillet, tossing everything together until well-coated and heated through.
Remove from heat, drizzle with the truffle oil, and garnish with fresh parsley before serving.