This is delicious, low-fat and super-easy ... I like to load it up with extra cilantro and tomatoes. Also try using lime juice in place of the lemon juice for a little different taste. It's a perfect vegetarian main dish salad, or serve it as a side dish with grilled or roasted pork or ham. Prep time includes time spent in the refrigerator blending flavors; yield depends on whether salad is eaten as the main dish or as a side dish.