This gluten - free dairy - free tuna noodle casserole uses brown rice pasta for wheat pasta and cooked potatoes and almond milk to create an alternative to the standard cream of mushroom soup. (rachaelroehmholdt.com)
I haven't tried it yet with pasta to see if it can sub as tuna noodle salad, but if you have please report back! (budgetepicurean.com)
Keep in mind these will change the texture and it won't have quite the same classic tuna noodle casserole taste. (wellnessmama.com)