Burrata is an Italian buffalo cheese, similar to mozzarella, but with a slightly softer core. You can order it from Meny and several other well-stocked grocery stores. You can also use mozzarella, if you prefer.
Put sliced sweet tomatoes on a plate. Add the cheese, then the ham and basil.
Drizzle over a good olive oil and a well-aged balsamic vinegar. Sprinkle with a little freshly ground pepper and flaxseed salt and serve.