Boil the chickpea pasta in salted water until al dente, reserving 2 tablespoons of the starchy pasta water before draining.
Steam the broccoli florets until they are bright green and tender-crisp, then set aside.
Season the chicken breast with sea salt, black pepper, and onion powder.
Heat olive oil in a skillet over medium-high heat and sear the chicken until golden brown and cooked through, then slice into strips.
In the same skillet, reduce heat to low and sauté minced garlic until fragrant, being careful not to burn it.
Whisk together the Greek yogurt, parmesan cheese, and reserved pasta water in a small bowl until smooth.
Add the pasta, chicken, and broccoli back into the skillet and pour the yogurt mixture over the top.
Toss everything together gently over low heat until the sauce is creamy and coats the pasta evenly.