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1
Boil the onions in plenty of water for 15 minutes until tender.
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2
Remove from pan and allow to cool.
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3
Remove the top 1 inch from each onion, chopping these tops and leaving to one side.
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4
Trim stalk end of onion so it will stand flat on a roasting tray and spoon out middle of each onion to create a hollow middle.
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5
Chop the scooped out middles and add to the tops on one side.
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6
Preheat oven to 400F.
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7
Heat a little oil in a frying pan and add chopped onion, chopped rosemary and garlic.
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8
Fry for two minutes, turn the heat down and add the cream.
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9
Stir in parmesan and season.
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10
Wrap a slice of prosciutto around each onion using the stalk of the rosemary to secure
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11
Place onions on a roasting tray and spoon in the chopped onion, cream mixture.
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12
Bake in the oven for 25 minutes until tender.
