Pierogies

When we buy the frozen pierogies, like potato and onion, for example, we bake them.  Irene first had them this way at Saige Perry's, and learned how to make them for us.
Preheat oven to 400 degrees.
Line a cookie sheet with parchment paper.
Put frozen pierogies on sheet and brush both sides with oil, like olive or peanut oil.
Bake for about 15 minutes.
Flip and sprinkle with seasoning.  We love the Greek Seasoning.
Bake for 5 more minutes, until light brown.