In a bowl combine cream cheese, feta, garlic powder, onion powder, and spinach. Mix well.
Cut a slit into the side of the chicken breasts with a sharp knife and wiggle the knife to create a pocket. Stuff with the spinach filling.
Rub the outside of the chicken breasts with olive oil and season with Cajun seasoning*.
Place the chicken breasts on a baking sheet and bake for 25 to 30 minutes, or until the thickest part of the chicken reaches 163°F.
Rest 5 minutes to allow the chicken temperature to rise to 165˚F before serving.
Notes
*Replace Cajun seasoning with your favorite seasoning blend if desired.
Store leftovers by individually wrapping them and placing them in a zip bag in the refrigerator for 3-4 days, or in the freezer in freezer bags for up to 2 months.