Thanks for your entry @juliensorel.
Could you please add a proof photo? Once you do, your entry will be valid. The rules are on this post. Since the pizza may already be gone by now 😊, you can add a photo with your Steemit name, the date and a plate or pan that you used in one of the above photos. You just have to do it for your first entry. Once you have a proof photo, the next entries will not need it.
Thank you!