Cut the watermelon into slices about 2 cm thick.
Cut the tomatoes into cubes and season with oil, salt and pepper.
Cut the feta into cubes and slice the spring onion thinly.
Divide all ingredients above 4 slices of watermelon, add Taggiasche olives and decorate with some leaves mint.
Cool the watermelon pizzas in the blast chiller quickly so as to consume them cold.