What’s the motivation for the Elder Dragon to fight the PCs? Is the Teostra here to kill hunters and can’t be swayed? Will it accept the meal and let them live if they never return if the food is good enough? And threaten to kill them if it isn’t satisfactory? Does the Teostra see an opportunity and decide to hire them to take out some lesser monsters that have been bothering it but hasn’t found the time to deal with yet. Perhaps eventually it asks them to even take out another group of hunters.
You can do multiple skill checks for encounters. Persuasion to see if the Teostra will not immediately fight and consider their food. A cooking utensil check for how impressive the cooking turns out. The Teostra is an Elder Dragon so the DC for checks could be set high, but up to you ultimately.
In Sync for Reddit we had the ability to view previously upvoted posts. I don’t know if Lemmy supports that, but that was a feature I used often to go back to something. Thanks