>DH is allergic to milk & all derivatives

Read your label on the Jello brand. I assume it has milk in it. Soy
milk can be successfully used in place of reg milk in some recipes. I
would buy the ready made in the quart. I make quiches with soy milk,
no problem. It should "set up" just fine. The eggs do that part
anyway. It will not taste as "creamy" and it *will* taste "different."