Keto tuna casserole

Keto tuna casserole

Just like mom used to make—NOT. Ditch the noodles in favor of celery, onions, and peppers, and indulge in a keto meal that's ready in 30 minutes. It's a whole new, delicious thing.

Keto tuna casserole

Just like mom used to make—NOT. Ditch the noodles in favor of celery, onions, and peppers, and indulge in a keto meal that's ready in 30 minutes. It's a whole new, delicious thing.
USMetric
4 servingservings

Ingredients

  • 2 oz. 50 g butter
  • 1 1 yellow onionyellow onions
  • 1 1 green bell peppergreen bell peppers
  • 513 oz. 150 g celery stalkcelery stalks
  • 16 oz. 450 g tuna in olive oil, drained
  • 1 cup 225 ml mayonnaise
  • 4 oz. 110 g freshly shredded parmesan cheese
  • 1 tsp 1 tsp chili flakes
  • salt and pepper
Serving
  • 6 oz. 175 g baby spinach
  • 4 tbsp 4 tbsp olive oil

Instructions

Instructions are for 4 servings. Please modify as needed.

  1. Preheat the oven to 400°F (200°C). Chop onion, bell pepper and celery finely and fry in butter in a large frying pan until slightly soft. Season with salt and pepper.
  2. Mix tuna, mayonnaise, parmesan cheese and chili flakes in a greased baking dish. Add fried vegetables and stir.
  3. Bake for 15-20 minutes or until golden brown.
  4. Serve with baby spinach and olive oil.

Tip!

Canned tuna is a life-saver when fridge and freezer are empty. Try to choose high-quality, MSC-labeled tunafish—preferably in olive oil instead of sunflower oil.

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57 comments

  1. Kristin Parker Team Diet Doctor

    Can I freeze

    Yes, you can freeze this dish.

  2. Venencia
    i made this last night and used ingredients as specified. didn't measure the mayo, just eyeballed and the dish came out very nice and not too much oil. used Monterrey jack cheese. perfect dish. my 18 months daughter loved it very much.
  3. Karyn
    I've made this a lot as it is really quick and very tasty. I use tuna in brine as all the options I can find in olive oil are a dodgy sounding "blend". I also add some konjac noodles to bulk it up a bit.
  4. Venencia
    this time i used tuna in brine and feta cheese- delicious and not oily
  5. Sam
    What is best to substitute for the celery? I cant stand celery 🤮
    Replies: #56, #59
  6. Kristin Parker Team Diet Doctor

    What is best to substitute for the celery? I cant stand celery 🤮

    You may wish to omit the celery, there is not a great substitute.

  7. Deborah Murphy
    This was sooooo good! 5 stars 🌟

    I used my cast iron skillet so sautéed the vegetables and then added the rest and popped in oven. One pan clean up made it that much better.

  8. Zoe
    Made a batch of this today! Delicious flavours but too oily for my taste. Had to drain the oil off before eating. I will definitely try it next with sour cream and philly instead of the mayo. Oh... I also added some lemon juice and chopped fresh chives. Super tasty!
  9. Leigh Batten
    I swapped the celery for chopped pickled cucumbers (Mrs Elswoods if you're in the UK) gave a nice crunch and slightly sour against the salty tuna and cheese, delicious!
  10. Kathleen
    I made this and used cream of mushroom and added green beans. At the end I broiled it a bit. Has anyone ate this cold? Or would you suggest always heating it up? I ate some fresh out of the oven and served on spinach. It was lovely and filling, comfort food for sure!!
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