Cook the chickpea pasta in a pot of boiling salted water 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, seasoning with half of the salt and pepper.
Sauté the chicken until golden and cooked through, then remove from the pan and set aside.
In the same skillet, add the sliced mushrooms, minced shallot, and garlic, cooking until the mushrooms are tender and browned.
Reduce the heat to low and stir in the Greek yogurt, truffle oil, remaining salt, pepper, and the reserved pasta water to create a smooth sauce.
Add the cooked pasta and chicken back into the skillet, tossing gently to coat everything in the creamy truffle sauce.
Garnish with fresh chopped parsley and serve immediately.