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All you need is 5 ingredients to whip out a delicious meal!

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Variations & Tips
- For added texture and interest, try mixing breadcrumbs with a little melted butter and sprinkle over the top before baking.
- A dash of Worcestershire sauce mixed into the tuna adds depth and a hint of umami.
- Personalize it by adding your favorite herbs or spices to the mixture; dill or thyme can be particularly nice with tuna.
- If you're open to including an extra ingredient or two, consider sautéing some onions or mushrooms and adding them to the mix.
- Leftovers store well in the fridge and can make for an easy reheatable lunch.
- Finally, remember that the key to a great casserole is in the ingredients' quality, so opt for the best canned tuna you can find, and don't shy away from a good quality cheese—it makes all the difference.

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