Three important facts that I promise are connected:
Although it seems that the ninja take turns cooking, Zane's food is apparently so good that they all eagerly await his turn. And his pies are apparently so good that just the smell of them brought a tear to Jay's eyes.
When someone passes away, grief makes menial tasks like cooking and cleaning very difficult. It's for this reason that a lot of bereavement support advice recommends giving gifts of pre-made food or service to those who are grieving. I can imagine the grief would be doubly worsened if you are grieving someone who typically did a lot of the cooking, or someone with whom you strongly associate such tasks.
In s4ep1 "The Invitation", Lloyd invites each of the ninja to dinner with him at Chen's Noodlehouse. However, he phrases it as "if you change your mind, you know where I'll be". Despite his vague wording, all of them unanimously know exactly where to go and when to be there. Furthermore, Cole even says "you're late" to Kai despite the fact that a meetup time was never discussed.
Anyway, my theory is that due to the grief of losing Zane making it difficult to cook, the ninja became regulars at Chen's Noodlehouse. They would go to the same location at roughly the same time almost every night, and that's how the ninja knew exactly where/when to meet up. Which means the place that helped them keep their heads above water post-s3, the place where they spent many nights grieving Zane's loss, is also the same place Lloyd chose to suggest adding a new teammate. And also the same place they found out Zane was alive.
This restaurant has become so strongly tied to their grief over Zane's loss, simply through the way it was there for his friends when he was not. Feeding them the food he himself was no longer present to cook for them. The statue in the garden represents the legacy of his heroism while the noodlehouse represents the legacy of the grief created by his absence, and in this essay I will -