Cut the round watermelon into a square, trimming off the outer rind and then the white rind corners if necessary. Slice the square watermelon flesh into 4 slices and then each square in half to make triangle shapes.
To make the Lemon Thyme oil see my recipe here or use olive oil. It's fairly easy to make and adds that little nuance of lemon to counter the balsamic syrup.
To plate, drizzle some of the lemon thyme olive oil and lay four watermelon triangles on top.
Next, sprinkle some of the feta cheese, a drizzle of balsamic syrup and pumpkin seeds. Top it all off with some freshly cracked black pepper. Serve chilled.