1.   Chop tomatoes and bell pepper into medium dice.

2.   Cut into medium dice.

3.   Cut onions into medium dice.

4.   Discard the seeds and stringy innards, then cut the flesh into medium dice.

5.   Peel the potatoes and cut into medium dice.

6.   Slice each section in half lengthwise and cut out the fibrous center cord, then cut into medium dice.

7.   When cool, cut into medium dice.