Place a box grater inside a big bowl.
Grate the shallot on the smallest side of the grater.
Slice the tomato in half horizontally.
Grate each tomato half on the larger side of the grater.
Grate down to the skin, and discard the skins.
Add all of the other ingredients.
Whisk well to combine and taste. Adjust the acid, sweetness, and salt. ** see notes