Bring a large pot of salted water to a boil and cook the whole grain pasta according to package instructions until al dente.
While the pasta cooks, season the chicken breast pieces evenly with the sea salt and black pepper.
Heat the olive oil in a large skillet over medium-high heat and sauté the chicken until golden brown and cooked through.
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 toss briefly until just wilted, then remove the pan from the heat.
In a small bowl, whisk together the Greek yogurt, lemon juice, lemon zest, fresh parsley, and fresh basil to create the sauce.
Drain the pasta, reserving two tablespoons of the cooking water, and add both to the skillet with the chicken and spinach.
Pour the yogurt herb sauce over the mixture and toss gently until every noodle is coated in a silky, vibrant glaze.