01 -
Turn your oven on to preheat. Dice the potatoes after peeling them, chop the garlic, and slice the onions into thin ribbons.
02 -
Mix the potatoes in a roasting dish with butter, garlic, the onion mix, rosemary, and the hot water.
03 -
Cover them up and place in the oven until they start getting soft, around 30 minutes.
04 -
As the potatoes bake, slowly cook the onions with a bit of sugar until they've turned golden and soft.
05 -
Spread the cooked onions around the potatoes, leave uncovered, and bake again until everything's golden and tender, roughly 20 minutes.