Summarize this article in one sentence.
Since you burned off the protective layer of seasoning, you'll have to re-season the cast iron before using it again. Otherwise, it won't provide a nonstick cooking surface, and it may begin to rust.  Coat the cookware in olive oil and bake in a 350-degree oven for one hour. You'll have to cook with the cast iron several times before it's fully seasoned, but this method will start the process. Stores that sell cast iron usually carry seasoning products to apply to your cookware. Try one of these if you'd prefer not to season your cast iron yourself.

Summary:
Season the cast iron again before cooking.