Growing up, we ate tuna, so much so that I developed a major case of dislike for it. Since white tuna has became more readily available and somewhat more affordable, I came back to eating tuna from time to time. Here's an easy tuna casserole that can be waiting for you when you return from running errands or perhaps at the end of a busy workday if your slow cooker is one that flips to "keep warm" at the end of your cooking cycle.