I don't like using Cheese Whiz in casseroles, so I wouldn't make this until my sister-in-law served it one night. No Cheese Whiz, just real cheddar cheese. Delicious, and kid-friendly.
One of my daughter's inlaw shared this delightfully different tuna casserole with me better then ten years ago. After the first time I made it it was good bye to the retro version. LOL Serving and prep time are approximate. ENJOY..!! :)