Halve the melon and take the seeds out with a spoon. Cut the rind away with a paring knife, then slice the melon thickly. Chill until ready to serve.
To make the salsa, hull the strawberries and cut them into large dice. Place in a small mixing bowl with the sugar and crush lightly to release the juices. Add the oil, orange juice, zest, and ginger. Season with salt and a generous twist of black pepper.
Arrange the melon on a serving plate, lay the ham over the top, and serve with a bowl of salsa.