Bring a large pot of salted water to a boil and cook the chickpea spaghetti according to package directions, reserving 1/4 cup of pasta water before draining.
Season the chicken breast with sea salt and black pepper on both sides.
Heat olive oil in a large skillet over medium-high heat and sear the chicken for 5-7 minutes per side until golden brown and cooked through.
Remove the chicken from the pan, let it rest for 2 minutes, then slice into thin strips.
In the same skillet, reduce heat to medium and sauté the minced garlic for 1 minute until fragrant.
Add the fresh spinach to the skillet and cook until just wilted.
In a small bowl, whisk together the Greek yogurt, parmesan cheese, and the reserved pasta water until smooth.
Return the cooked pasta and sliced chicken to the skillet.
Pour the yogurt mixture over the pasta and toss everything together over low heat until the sauce is creamy and coats the noodles.
Garnish with fresh parsley and serve immediately.