Bring a large pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
While the pasta cooks, season the chicken breast evenly with sea salt, black pepper, and onion powder.
Heat the olive oil in a large skillet over medium-high heat and sear the chicken until golden brown and cooked through, about 5 to 6 minutes per side.
Remove the chicken from the pan and let it rest for 3 minutes before slicing it into thin strips.
In the same skillet, reduce the heat to low and sauté the minced garlic for 1 minute until it becomes fragrant.
In a small bowl, whisk together the Greek yogurt, grated parmesan, and 2 tablespoons of the hot pasta cooking water until the mixture is smooth.
Add the cooked pasta, sliced chicken, and baby spinach to the skillet, then pour the yogurt mixture over the top.
Toss everything gently over low heat until the spinach is just wilted and the sauce is creamy, then garnish with fresh parsley before serving.