In a large bowl combine the olive oil, balsamic vinegar, garlic, salt and pepper. Add the olives, tomatoes, mozzarella and basil and toss until the dressing coats all of the ingredients.
Notes
Substituting Cherry and Grape Tomatoes
In most recipes cherry and grape tomatoes are interchangeable, though there are some subtle differences. Cherry tomatoes can range in size from quite small to golf ball size. Grape tomatoes are usually smaller and less sweet than cherry tomatoes. Grape tomatoesare also meatier, with a thicker skin. Cut the tomatoes in half for this salad, or even in quarters if your cherry tomatoes are on the larger side. You could also use full sized tomatoes, just cut them into 1-inch cubes. You can also cut this recipe in half; it makes a lot and serves 8, which might not be what you need.