To assemble: On two luncheon plates, lay out the sliced tomatoes, covering the plate. Add the mozzarella pearls or overlap the slices every other one with the tomatoes. Fit in cucumber slices every couple of tomatoes slices, dividing between both plates. Drizzle the Olive oil, then the balsamic reduction on each plate.
Sprinkle the sea salt and fresh ground pepper. Toss on the microgreens! Serve immediately.