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Wash the beets gently, making sure that you donât tear the skins, then place in a pan of warm water, bring to the boil, reduce the heat and simmer until tender â around 20â30 minutes. Alternatively, you can steam whole beetroot or bake them in the oven for 2â3 hours at 150Â°C/gas mark 2.ash the beets gently, making sure that you donât tear the skins, then place in a pan of warm water, bring to the boil, reduce the heat and simmer until tender â around 20â30 minutes. Alternatively, you can steam whole beetroot or bake them in the oven for 2â3 hours at 150Â°C/gas mark 2.
Prick your sweet potatoes each 2-3 time with a fork, then place them directly on the oven rack in the middle of the oven, above the rack with the foil. Turn the oven on to 425. Bake for 45 minutes for sweet potatoes/yams that are 2-3 inches in diameter. For sweet potatoes that are up to 4 inches in diameter, bake for an hour. For super large sweet potatoes, bake for an hour and 15 minutes. After the time has elapsed, don't open the oven but turn it off. Let the sweet potatoes sit in the oven for at least 30 minutes but up to an hour.