Bring a pot of salted water to a boil and cook the chickpea pasta according to package directions until al dente.
Season the chicken breast with garlic powder, half of the sea salt, and half of the black pepper.
Grill or pan-sear the chicken over medium-high heat for 6-7 minutes per side until fully cooked, then slice into bite-sized pieces.
In a large bowl, whisk together the Greek yogurt, olive oil, lemon juice, lemon zest, and dried oregano to create the dressing.
Halve the cherry tomatoes, dice the cucumber, and roughly chop the fresh parsley.
Add the cooked pasta, sliced chicken, spinach, tomatoes, and cucumber to the bowl with the dressing.
Toss everything together until well-coated, seasoning with the remaining salt and pepper before serving.