One possible idea for this fan fiction could be that the snake is a magical creature in a fantasy world. It discovers a pie left by a human traveler. The snake, being curious, decides to eat the pie. As it takes a bite, it gains some strange powers related to the ingredients of the pie, like the ability to fly if the pie had feathers from a magical bird in it.
There was a family having a picnic. They were enjoying some delicious pies. All of a sudden, a cold wind blew and a ghost appeared. The ghost seemed fascinated by the pie - eating scene. It started to mimic the family's actions of eating the pie, but every time it took a 'bite', the pie would disappear into thin air. The family was so scared that they left all their things and ran away.
Once upon a time, in a small, old - fashioned village, there was a strange pie - eating competition. As the people were devouring their pies, a strange mist rolled in. Out of the mist emerged a ghostly figure. It was an old baker who had died under mysterious circumstances in his pie shop. The ghost seemed to be drawn to the pie - eating scene, as if it was still attached to the pies it used to make. Everyone stopped eating in horror as the ghost floated closer, moaning about the unfinished business it had with the pies. Then suddenly, it disappeared, leaving behind a cold chill and a lot of uneaten pies.
Once, at a county fair, there was a cream pie eating contest. A young boy named Tom participated. He had never eaten a cream pie so quickly before. As he dug in, the cream smeared all over his face, making everyone laugh. He managed to finish his pie in record time for his age group and was really proud of himself.
Well, it could be that the dragon is on a quest to find the most delicious pie in the land. After searching far and wide, it finally discovers a magical pie. The dragon then has to figure out how to eat it without using its fiery breath and ruining the taste. So it tries all sorts of comical ways, like using tiny utensils made for fairies.
Sorry, I'm not aware of specific 'eating a pie' fan fiction. You could try searching on fan fiction websites like Archive of Our Own or FanFiction.net.
Once upon a time, there was a man in a small, old cottage. He sat down to eat a pie. As he started, a strange mist filled the room. For five minutes he ate the pie, not noticing the figure forming in the corner. When he finally looked up, he saw a ghostly face, eyes hollow, and a sad moan filled the air. The man ran out of the cottage, leaving the half - eaten pie behind, and never dared to return.