Cook the chickpea pasta in a pot of boiling salted water until al dente, reserving 1/4 cup of the starchy cooking water before draining.
Dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat and sauté the chicken until golden brown and cooked through, then remove from the pan and set aside.
In the same skillet, add the sliced cremini mushrooms and minced shallots, cooking until the mushrooms are tender and caramelized.
Add the minced garlic to the skillet and cook for 30 seconds until fragrant.
Return the cooked chicken to the pan along with the pasta, nutritional yeast, and the reserved pasta water.
Toss everything together over medium heat until the water and yeast form a light, glossy sauce that coats the pasta.
Remove from the heat, drizzle with the truffle oil, and garnish with fresh chopped parsley before serving.