In a food processor or blender, combine the white wine vinegar, ketchup, Splenda, Worcestershire, roughly chopped white onion and salt. Puree the dressing until it is well blended.
While the food processor is still running, drizzle in the salad oil.
Cook the bacon, chop the water chestnuts and prepare any other desired additional ingredients.
Plate the spinach and add the crispy bacon, chopped water chestnuts and cherry tomatoes. Drizzle with 2 Tablespoons of the tangy vinaigrette and serve.
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