Jada's eldest child is a vegetarian since Khalil prepares a vegetarian dish specifically due to this child's dietary preference. This establishes that at least one individual in the family follows a vegetarian diet.

Khalil is the uncle without his own children. He is married, as stated, but the information provided clarifies that he has no children of his own. Therefore, he is an uncle to Jada and Amir's children.

Jada is Amir's sibling and has two children of her own; thus, Amir's child is a cousin to Jada's children. Since this is the only child mentioned for Amir, this child is not one of the two children mentioned for Jada. Therefore, the relationship between Amir's child and Jada is that of aunt (Jada) and nephew or niece (Amir's child).
In a family, there are three siblings: Jada, Khalil, and Amir. Jada has two children, and Amir has one. Khalil is married but does not have any children. During family gatherings, there is a rule that each sibling cooks one dish. Khalil always cooks a vegetarian dish because Jada's eldest child is a vegetarian. Who in the family is a vegetarian, and which sibling is the aunt or uncle without their own children? Also, explain the relationship between Amir's child and Jada.

Respond very briefly.