This easy sandwich is a harmony of flavors that you can toss together for a quick lunch or dinner. Fresh heirloom tomato goes well with the slightly salty, creamy burrata and tangy balsamic vinegar. Be sure to toast the ciabatta, as it adds a welcome crunch and keeps the bread from getting soggy. If you're looking to add more protein to the sandwich, sliced deli meat like chicken or turkey would be delicious.