Rinse, scrub and slice the potatoes into ½ inch slices.
Place the potatoes in a pot and cover with water.
Place over high heat and bring to a boil. Reduce the heat to medium and allow the potatoes to cook for 8 – 10 minutes. Drain the potatoes.
Heat a grill pan or BBQ to medium high. Brush potatoes with olive oil and place on the grill for 3 – 5 minutes to achieve grill marks. Remove from the heat and arrange potatoes on plate.
In a medium sized bowl combine tomatoes, mozzarella, onions, and basil.
Top each potato with a spoonful of the mixture.
Drizzle balsamic glaze.
Enjoy.