Bring a large pot of salted water to a boil and cook the chickpea penne according to package instructions until al dente, then drain and set aside.
While the pasta is boiling, dice the chicken breast into bite-sized pieces and season them with half of the sea salt and black pepper.
Warm a large skillet over medium-high heat and cook the chicken pieces until they are golden brown and fully cooked through, then transfer to a plate.
In the same skillet, add the sliced cremini mushrooms and minced shallots, sautéing for 5-7 minutes until the mushrooms release their moisture and turn a deep brown.
Stir in the minced garlic and fresh thyme, cooking for just one minute until the aroma fills the kitchen.
Pour the chicken broth into the skillet to deglaze, using a wooden spoon to scrape up the flavorful browned bits from the bottom of the pan.
Turn the heat down to low and whisk in the Greek yogurt and Parmesan cheese until the mixture is creamy and well-combined.
Add the cooked pasta and chicken back into the skillet, tossing everything together until the noodles are thoroughly coated in the sauce.
Remove from heat, drizzle the truffle oil over the top, and sprinkle with the remaining salt and pepper before serving.