Bring a pot of salted water to a boil and cook the chickpea pasta according to package instructions until al dente.
While the pasta cooks, dice the chicken breast into bite-sized pieces and season with the sea salt and black pepper.
Heat a large non-stick skillet over medium-high heat and cook the chicken until golden brown and cooked through, then remove from the pan.
In the same skillet, add the sliced cremini mushrooms and minced garlic, sautéing until the mushrooms are tender and browned.
Lower the heat and add the baby spinach to the skillet, stirring just until it begins to wilt.
In a small bowl, whisk together the Greek yogurt and truffle oil with one tablespoon of the pasta cooking water to create a smooth, creamy base.
Drain the pasta and add it to the skillet along with the cooked chicken.
Remove the skillet from the heat and pour the truffle yogurt sauce over the pasta, tossing gently to coat every piece evenly.
Garnish with freshly chopped parsley and serve immediately while warm.