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1
Soak the purple corn in the 10 cups of cold water overnight.
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2
Transfer the corn to a large pot and measure the soaking liquid.
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3
Add enough water to make 15 cups.
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4
Pour the liquid back over the corn, and add the pineapple, quince, cinnamon sticks, cloves, lemon juice and sugar.
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5
Bring to a boil, reduce the heat, and simmer for 2 to 2 1/2 hours.
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6
Remove from the heat, remove the corn cobs and strain the mixture, pressing against the strainer with a spoon to extract all the juice from the fruits and spices.
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7
There should be about 8 cups of liquid.
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8
If not, place the corn and fruit in a saucepan with water just to cover and simmer for about 20 minutes.
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9
Strain and add amount needed to total 8 cups.
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10
Discard the corn and fruit.
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11
Place the liquid in a heavy saucepan, reserving 1 cup of the liquid.
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12
Add the dried prunes, cherries and apricots to the 7 cups of liquid.
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13
In a small bowl, combine the reserved 1 cup of liquid and the sweet potato flour or cornstarch.
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14
Mix thoroughly with a fork until dissolved.
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15
Pour this mixture back into the saucepan with the liquid and dried fruits.
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16
Bring to a boil over medium heat, whisking until the mixture is thick, about 25 minutes.
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17
Remove from the heat and pour the pudding into a deep 2 quart serving dish or individual ramekins.
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18
Let cool.
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19
To serve, dust the top with ground cinnamon.
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20
Serve the pudding with crema.