"This healthy twist on penne rosa is just as delicious as the original. Substituting fat-free Greek yogurt instead of heavy cream and whole wheat pasta makes this dish a much lower-calorie and lower-fat option. Add grilled chicken to up the protein!"
Fill a large pot with lightly salted water and bring to a boil. Stir in penne and return to a boil. Cook pasta uncovered, stirring occasionally, until cooked through, but still firm to the bite, about 11 minutes. Drain.
Heat 1 tablespoon olive oil in a skillet over medium heat. Add chicken; cook and stir until no longer pink in the center and the juices run clear, about 5 minutes. Transfer chicken to a plate. An instant-read thermometer inserted into the center should read at least 165 degrees F (74 degrees C).
Heat remaining 1 tablespoon oil in the same skillet. Add garlic and red pepper flakes; cook and stir until garlic begins to soften, about 2 minutes. Stir in tomatoes; cook until tender, about 5 minutes. Season with salt and pepper. Remove from heat. Stir in spinach; cover and let stand until wilted, about 2 minutes.
Pour marinara sauce into a separate saucepan over medium heat. Cook until heated through, about 5 minutes. Transfer 1/2 the sauce into a bowl; stir in yogurt. Whisk mixture into the rest of the marinara in the saucepan.
Uncover tomatoes and spinach and place back over low heat. Stir in penne, sauce, and basil; cook until heated through, about 5 minutes. Divide penne into bowls and serve topped with chicken and Parmesan cheese.