Bring a pot of salted water to a boil and cook the chickpea pasta according to package directions, reserving 2 tablespoons of pasta water before draining.
While the pasta cooks, dice the chicken breast into bite-sized pieces and season with sea salt and black pepper.
Heat olive oil in a large skillet over medium-high heat and sauté the chicken until golden brown and cooked through, about 5-7 minutes.
Add the minced garlic to the skillet and cook for 30 seconds until fragrant, then stir in the fresh spinach until just wilted.
In a small bowl, whisk together the Greek yogurt, lemon juice, and lemon zest.
Reduce the skillet heat to low, add the cooked pasta and the reserved pasta water, then stir in the yogurt mixture until a creamy sauce forms.
Toss everything together until well-coated and serve immediately.