Have you ever bought a watermelon and it's not that sweet? Don't toss it and make this watermelon jam. Made with four ingredients, this homemade jam is thick and full of watermelon flavor.

Rub the flour and butter together to resemble fine crumbs, mix in the salt, soda and sugar. Mix in the buttermilk to form a soft dough and roll out to about 1cm thick. Cut out 4 rounds and place ...