On a large cutting board, carefully cut the watermelon in half
Turn one side of the watermelon flat side down on the cutting board
Start to slice, working from one side to the other
Turn the melon halfway and start cutting the opposite direction, making cube-sized shapes.
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Notes
A whole watermelon that hasn't been sliced will last at room temperature for a few weeks. Once cut, watermelon will last up to 5 days in the fridge.
From the weight, sound and overall appearance, there are a few characteristics of a ripe watermelon to be on the lookout for. First, the whole watermelon should be heavy for its size as this is key to a juicy fruit. Lift each watermelon aiming to pick the heaviest. Next, give it a tap, you are listening for a deep hollow sound. Lastly, the watermelon should be blemish-free, dark green in color with a yellow spot or "field spot" on the melon.
Freezing watermelon is a great way to reduce food waste that is really simple. Freeze any leftover watermelon (without the rind) then enjoy as a cool treat, in a smoothie or turned into Watermelon Ice Cream.