Bring a pot of salted water to a boil and cook the chickpea rotini according to package directions until al dente.
Before draining the pasta, carefully reserve 2 tablespoons of the starchy pasta water and set it aside.
While the pasta cooks, dice the chicken breast into bite-sized pieces and season with sea salt, black pepper, and red pepper flakes.
Heat the olive oil in a large skillet over medium-high heat and sauté the chicken until golden brown and cooked through, about 5-7 minutes.
Reduce the heat to medium, add the minced garlic to the skillet, and cook for 1 minute until fragrant.
Add the baby spinach to the skillet and stir until it just begins to wilt.
In a small bowl, whisk together the Greek yogurt, grated parmesan, and the reserved pasta water until smooth.
Turn off the heat and add the cooked pasta to the skillet, then pour the yogurt mixture over the top.
Toss everything together gently until the pasta is coated in a creamy sauce and serve immediately.