Preheat oven to 400 degrees and cook puff pastry shells according to directions on package. When shells are done, allow to cool. Set aside.
Place each ear of corn on a sheet of aluminum foil. Drizzle with olive oil. Wrap up and place in oven to cook for 35-40 minutes. Set aside and allow to cool completely.
When corn has cooled, cut corn from cob. Place in bowl.
Add onion, chili powder, lime juice, bell pepper to bowl. Mix well together.
Spoon into pastry shells. Top with feta and cilantro. Serve and ENJOY!