Rival 18 Qt Roaster Oven with Buffet Server "scallop" Questions

I can't find the insert for my18qt roaster oven. Can I bake scalloped potatoes without it? Do not try it, you will ruin the cooker.

water in the outside pan for scalloped potatoes download manual here: http://www.rivalproducts.com/search?q=rival%20manual%20roaster see page 4 note : Never place food or liquid directly into the ...