Dragon Tamer by Melody Rose

Joan left a big impression in her first days at the elite Bouclier Academy. Her magical cooking warmed hearts and turned heads, and even starting to thaw the icy heart of Theo, the irresistible headmaster’s son, but her trials and tests have only begun.
After all, there are lost souls who need reuniting, the school’s Arcane Combat team needs help to win the big match, and a dragon needs taming. It’s up to Joan to live up to her destiny and save the day and the school’s future.
There’s just one problem. Theo’s obsessive ex, the vilest witch in the school, isn’t happy with Joan. She’s out for blood, and it might take more than a home-baked pie to stop her.