Stir well, bring to the boil and, once bubbling, turn down the heat, put the lid on and simmer for 40–50 minutes (though start checking at 30) until the sweet potatoes are soft and the squash ...
Cut the squash in half lengthwise, peel it, and scrape out the seeds. Cut the halves lengthwise into 1/2-inch-thick strips. Then cut the strips crosswise into 11/2-inch pieces. Heat the oil in a ...