Pound chicken breasts evenly and season with salt and pepper.
Heat olive oil in a skillet and cook chicken until golden and cooked through, about 6-8 minutes per side.
Remove chicken and set aside. In the same skillet, add garlic and sun-dried tomatoes; cook for 1 minute.
Add chicken broth, parmesan, and cottage cheese; stir until smooth. Return chicken to skillet and simmer for 5 minutes. Add spinach if using and cook until wilted.
Finish with torn basil and serve hot.
Notes
For a creamier sauce, blend cottage cheese before adding.