Backpacking Tuna Noodle Casserole Full recipe at: https://www.rei.com/blog/camp/backpac... Crunchy fried onions, noodles in a creamy sauce, and protein-heavy tuna: enjoy a slice of classic Americana cooking in the backcountry with this Tuna Noodle Casserole. Tuna Noodle Casserole holds a special place within American comfort food, which makes it a perfect candidate for a backpacking meal.