Test 1 - Tomato, Cucumber and Red Onion Salad

http://www.food.com/recipe/tomato-cucumber-and-red-onion-salad-180329

This is best eaten fresh - although you want the cucumber to absorb the marinade, if you finish it to far in advance, the other vegetables will absorb too much vinegar and be overly tart.

2 large cucumbers, halved lengthwise, seeded and sliced
1⁄3 cup red wine vinegar
1 tablespoon white sugar
1 teaspoon salt
3 large tomatoes, seeded and coarsely chopped
2⁄3 cup coarsely chopped red onion
1⁄2 cup chopped fresh basil leaf
3 tablespoons extra virgin olive oil
salt and pepper

1. In a large bowl, toss together the cucumbers, vinegar, sugar and salt. 
2. Chop the onion and soak it in water to remove some of its bite.
3. Let both stand at room temperature for an hour, stirring occasionally.
4. Drain the onions and a to the cucumbers, along with the tomatoes, basil and oil. Toss to blend. 
5. Season to taste with salt and pepper.