In a large mixing bowl, mix all the ingredients except for the tomatoes, cheese and lemon juice. Do this carefully so as not to destroy your tuna chunks.
In an oven proof dish place a layer of sliced tomatoes on the bottom. Place a layer of the mix over the top. Repeat this process until you run out of ingredients.
When you have finished layering your bowl, sprinkle with cheese, lemon juice and a little more oregano and paprika.
Place in pre heated oven at 240C for about 30 minutes or until the dish has cooked through.
Serve and enjoy.
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