Colombian Tomato Salad

I went to a party yesterday where most of the guests were from South America, and the food was incredible, so I got a few recipes from the cooks. This was a big, big hit, and so simple!!! This seems to be about the right amount for a small family.

3 tomatoes
2 sweet onions
salt and pepper
fresh lime juice to cover
fresh water

Run the tomatoes and onions through the fine slicer of a mandolin or food processor. 

Season with the salt and pepper, and mix well.

Cover with the lime juice and a little water.