When pasta is done cooking, drain. Run cold water over pasta to cool and transfer to large bowl.
Add baby spinach, ripping leaves in half if too large. Stir in tomatoes, mozzarella and black olives. Add in pesto, oil, vinegar, and salt & pepper to taste. Mix well.
Serve immediately or refrigerate in airtight container until ready to serve.
Keyword caprese, cold pasta salad, farfalle, pasta salad