Ingredients:

1 large Spanish or Vidalia onion,halved lengthwise and very thinly sliced
1 tablespoon salt
5 large ripe tomatoes,peeled and sliced
1 serrano or jalapeno chili, seeded and finely minced
1 tablespoon minced fresh cilantro or parsley
3 tablespoons vegetable or extra-virgin olive oil

Methods:

1. Place the onion slices and salt in a bowl; cover with cold water,and soak for about 10 minutes.Drain in a colander and rinse briefly under cold running water.Shake well.This step will eliminate most of the sharpness of the onion.
2. Arrange the tomatoes on a platter.Salt generously.Top with the onion,chili,and cilantro. Sprinkle the oil evenly over the salad,toss to combine,and serve at once.