Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions, reserving 0.25 cup of pasta water before draining.
While pasta cooks, heat olive oil in a large skillet over medium-high heat and add the diced chicken breast seasoned with a pinch of the salt and pepper.
Cook chicken until golden brown and cooked through, then remove from the skillet and set aside.
In the same skillet, add the sliced cremini mushrooms and sauté until they release their moisture and turn a deep golden brown.
Add the minced garlic to the mushrooms and cook for 1 minute until fragrant.
Reduce heat to low, then return the chicken to the skillet and stir in the Greek yogurt, truffle oil, and reserved pasta water to create a creamy sauce.
Fold in the cooked pasta, remaining salt, and black pepper, tossing until every noodle is coated in the velvety sauce.
Garnish with fresh chopped parsley and serve immediately.