In a small saucepan, combine 1 cup vinegar, sugar and ground star anise. Bring to a boil then remove from heat. Let cool for a bit and then stir in red onion. Let sit for 30 minutes.
In a large bowl, combine the tomatoes, olives, cheese, herbs and Serrano pepper. Drain onion and add to tomato mixture; save some of the marinade that you used for onions (you can use it as dressing).
In a small bowl, whisk the oil, lime juice and 2 tbsp red wine vinegar; pour over tomatoes. Drizzle with saved marinade, about 1-2 tablespoons.
Recipe by CookingGlory at http://www.cookingglory.com/recipes/meal-ideas/salads/olive-caprese-salad/