Make the salad dressing: In a small bowl or salad dressing bottle, mix together the olive oil, apple cider vinegar, xylitol, oregano, basil, salt, pepper, Season All, leek powder, lemon zest and lemon juice. Stir or shake to combine.
Combine the salad ingredients: Line a large bowl with the purple kale and romaine leaves, if using. Then, add the spring mix. Nicely arrange the tomatoes, peppers, pecans, green olives, Kalamata olives and feta on top. Serve with the salad dressing on the side. Be sure to stir or shake the dressing right before pouring it onto the salad. Garnish with more oregano and freshly ground black pepper on top, if desired. Savor!