I've just finished making home-made Pico de Gallo and it is chilling in the fridge now.
Pico de Gallo
6 plum tomatoes
2 small white onions
2-3 jalapeno peppers (I think I added 3, but then I love it spicy!)
Large handful of cilantro (think mine totalled about 1/2 cup)
Chop the first 4 ingredients finely and toss into your dish. Squeeze juice of one lime over top and mix all together. Chill for a little while before enjoying. Although I couldn't resist trying it out myself.