Cook the pasta according to package directions. Drain and set aside.
In a skillet, warm the olive oil and sauté the garlic until fragrant.
Stir in the Greek yogurt and Parmesan cheese, mixing until creamy.
Add diced chicken and spinach, stir until the spinach wilts and the chicken is heated through.
Toss the pasta with the sauce until everything is well coated.
Season with salt and black pepper before serving.