Add olive oil, red wine vinegar, chopped garlic & sliced onion into a jar. Add sea salt and pepper, shake it up, and put in fridge for 4 hours. Slice up tomatoes, cucumber and put onto large plate or serving tray. Top it off with the olives, mozzarella and add a little salt and pepper. After the dressing has been marinating with the onions and garlic for 4 hours, add that to the top of the salad and ENJOY!!