Combine fruit and veggies together, though if not serving right away, combine only the tomatoes and cucumber and keep watermelon separate and chilled until ready to serve. Put oil, lemon juice and vinegar to taste in jar with herbs. Shake until combined. Taste to adjust acid/oil and season with salt and pepper. When ready to serve toss all ingredients together.
Suggestion to add avocado cubes to salad
If have leftovers and want to reinvent for a different take on gazpacho, combine leftovers (not sure if avocado would do well) add parsley and jalapeno or serrano pepper in blender and whirl to desired consistency... Yum!
Riff on the salad by Gerald Hirigoyen with Lisa Weiss in book: Pintxos: Small Plates in the Basque Tradition. See link: http://www.epicurious.com/recipes/food/views/Tomato-and-Watermelon-Salad-352389#ixzz1zh5U4zY0
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