Pour off the oil from the tuna cans, leave the juice in the cans in their own juice. Put the tuna in a bowl and chop with a fork. Add corn, cut onions and tomatoes into small pieces, add too. Season with salt and pepper. Mix everything together well.
Now fold in the grained cream cheese. Possibly add seasoning. Finally, mix in the crushed eggs.
Let the lettuce steep for about 30 minutes at room temperature.