To prepare the watermelon feta salad platter, start by prepping the watermelon. Discard peel of the watermelon. Cut into thick slices, deseed and then cut into desired bite sized shapes.
Thinly slice the onions. Squeeze lemon juice over the sliced onions. Add 2 tsp extra virgin olive oil and 1/4 tsp salt and massage well using finger tips so that the onion slices are separated into thin rings or segments.
Cube or crumble the feta cheese.
Wash the arugula leaves well until free or mud / dirt. Dry in a salad spinner or on cotton towels.
Take a large platter, around 12” diameter.
Pile the cut watermelon, lemon marinated onions, arugula leaves and cubed feta. Set the extra virgin olive oil, balsamic vinegar and chilli salt in small bowls.
Serve chilled.