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 the pasta cooks, season the chicken breast with sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat and sear the chicken until golden and cooked through, then remove from the pan and slice into strips.
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 the heat to low, then add the cooked pasta, sliced chicken, and fresh spinach to the skillet, tossing until the spinach is wilted.
Stir in the reserved pasta water and grated parmesan cheese to create a light sauce, then remove from heat.
Drizzle with truffle oil and garnish with fresh parsley before serving.