What are some things to cook for a little kid with allergies and a family with dietary restrictions?

First of all, mazel tov on your conversion! Next, this is a real stumper! All I can come up with is Meat!!! I would actually stick with a meat course with vegetable and a salad- maybe add rice or potatoes... this way your brother is okay with any of it, your sister can pick what she wants and have a snack later, your dad shuld be happy enough, your mom will be fine if she keeps away from the rice/potatoes and there is no mxing of dairy and meat or anything non-kosher for you! Other than that, it would be easier to go out to eat, except you know that you would have to be super careful about your brother. Have a good summer and congrats on your new siblings! Shalom