To make this dish gluten-free, just swap out the Ritz crackers for a gluten-free variety. There are lots of options available now that will give you the same buttery crunch without the gluten. Also, be sure to use a gluten-free mayonnaise and double-check that all other ingredients are certified gluten-free. With just these small adjustments, you’ll have the same delicious casserole that everyone can enjoy!