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 the pasta cooks, heat the olive oil in a large skillet over medium-high heat and add the diced chicken breast.
Sauté the chicken until golden and cooked through, then add the sliced mushrooms and minced garlic to the pan.
Cook until the mushrooms are tender and the garlic is fragrant, then remove the skillet from the heat.
In a small bowl, whisk together the Greek yogurt, truffle oil, and the reserved pasta water until smooth.
Toss the cooked pasta into the skillet with the chicken and mushrooms, then pour the yogurt mixture over the top.
Season with sea salt and black pepper, stirring gently to coat everything in the creamy sauce.
Garnish with fresh parsley and serve immediately while warm.