Tuna casserole became popular in the united states during the 1950s, primarily as a sauce that could be poured over egg noodles. This dairy-free take on the casserole classic is family-style home cooking at its best The addition of whole wheat pasta instead of the traditional egg noodles boosts the recipe's nutritional value. The recipe is incredibly easy to make and can be served hot or chilled, which makes it perfect for laid-back family get-togethers, office potlucks, and weeknight meals.