There are probably as many versions of this tomato sauce as there are individual grill jockeys in Morocco. This one offers the refreshing taste of fresh mint.
Cut the tomatoes in half crosswise. Grate the tomatoes through the large holes of a four-sided grater into a shallow bowl. Grate in the shallot the same way. Stir in the mint and lemon juice, season with salt and pepper to taste, and serve immediately.