This is a very easy and tasty recipe, Excellent for a quick weeknight dinner.
Preheat oven to 350°.
Grease or line with tin foil sprayed with cooking spray a baking sheet.
Mix together the mayonnaise, parmesan cheese and oregano and pour into a shallow dish.
Pat the chicken breasts dry with a paper towel, and sprinkle with salt and pepper.
Dip the chicken in the mayonnaise mixture and place on the prepared baking sheet.
Bake in oven uncovered, for about 40-45 minutes or until a thermometer inserted reads 160°.
Remove from oven and let rest for about 5 minutes before serving.