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Hearty Tuna Casserole

Here's a jazzed-up version of Mom's tuna casserole that's sure to be comfort food for the whole family! Jan Heshelman of Bloomfield, Indiana adds pizzazz to the traditional dish with mustard, sour cream, thyme and zucchini. "I found this recipe in a magazine," says Jan. "It is one of the few dishes with zucchini that my husband will eat."
  • Total Time
    Prep: 30 min. Bake: 35 min.
  • Makes
    6 servings


  • 3 cups uncooked yolk-free wide noodles
  • 2 cans (6 ounces each) light water-packed tuna, drained and flaked
  • 1 cup shredded zucchini
  • 3/4 cup reduced-fat sour cream
  • 1 celery rib with leaves, thinly sliced
  • 1/4 cup chopped onion
  • 1/4 cup reduced-fat mayonnaise
  • 2 teaspoons prepared mustard
  • 1/2 teaspoon dried thyme
  • 1/4 teaspoon salt
  • 1 cup shredded part-skim mozzarella cheese
  • 1 medium tomato, chopped


  • Cook noodles according to package directions; drain. In a large bowl, combine the noodles, tuna, zucchini, sour cream, celery, onion, mayonnaise, mustard, thyme and salt.
  • Spoon half into a 2-qt. baking dish coated with cooking spray. Sprinkle with half of the cheese. Repeat layers. Top with tomato.
  • Cover and bake at 350° for 30-35 minutes. Uncover; bake 5 minutes longer.
Nutrition Facts
3/4 cup: 279 calories, 10g fat (5g saturated fat), 41mg cholesterol, 516mg sodium, 22g carbohydrate (0 sugars, 2g fiber), 25g protein. Diabetic Exchanges: 3 lean meat, 1 starch, 1 vegetable.

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  • Marilyn
    Jan 22, 2019

    This was really good! I just substituted 2 C frozen mixed veggies for zucchini, and red bell pepper for tomatoes. And cheddar jack cheese for mozzarella. I think they meant 2 tablespoons of prepare mustard. And I did 1/2 c sour cream and 1/2 cup of mayonnaise. I didn't care for the dried thyme and will be using dried parsley next time. It was a great dinner to throw together on a cold winter night! Thank you Taste of Home!!

  • mythyagain
    May 23, 2016

    This is the healthiest tuna casserole that I've ever made. I substituted grated carrot for the zucchini and added some chopped fresh spinach. It was delicious.

  • jtermont
    Nov 14, 2015

    I made this for my husband and I and he really like it. I like the fact it had zucchini, I have not seen that before and really appreciated that. I would definitely make this again.

  • goodfriends432351
    Jan 12, 2014

    glad to see a healthy version of this classic..used Hellman's Balsamic Mayo and Dijon mustard in it and it really was much better tasting while still keeping calories under control.

  • sdipiazza
    Oct 25, 2013

    I cut the recipe in half. I used pasta shells instead of noodles, chopped fresh spinach instead of zucchini, added chopped mushrooms, chopped red bell pepper. Since I cut the sauce ingredients in half I was afraid it would be dry so I poured 1/4 cup chicken broth over the whole dish before I baked it. I didn't layer the cheese. I waited until the casserole was cooked through and then added 1/4 cheese on top and let it melt. Turned out really tasty. Would definitely make again.

  • mfl
    Dec 1, 2009

    I like the idea of adding zucchini to this recipe to add some veggies to the was very tasty... we enjoyed it. I served it w/a baked tomato dish.