Bring a pot of salted water to a boil and cook cavatappi according to package directions until al dente.
While pasta cooks, heat olive oil in a large skillet over medium heat and add diced chicken breast.
Sauté chicken until golden and cooked through, then add minced garlic and cook for 1 minute until fragrant.
Stir in the tomato puree, dried oregano, sea salt, and black pepper, simmering for 3 minutes.
Add the fresh baby spinach to the skillet and stir until just wilted.
Turn off the heat and stir in the Greek yogurt until the sauce is creamy and pink.
Drain the pasta, reserving a splash of water, and toss the cavatappi into the sauce.
Garnish with fresh basil and serve immediately.