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1
Combine onion, celery, carrots, and beans in a soup pot.
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2
Add enough water to cover beans by 3 inches.
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3
Bring to a boil, reduce heat, and simmer until beans are tender but not mushy, approximately 55 minutes.
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4
If using a pressure cooker and non-soaked beans, bring beans and 4 cups of water to high pressure for 1 minutes, remove from heat and let sit for 10 minutes.
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5
Open, drain beans.
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6
Return beans to pressure cooker, add onions, celery, carrot, and 4 cups fressh water.
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7
Bring to high pressure for 15 minutes.
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8
Turn off heat, bring pot to sink and run under cold water to reduce pressure.
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9
Open and check beans to see if they are fully cooked.
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10
If not, simmer uncovered until done.
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11
Drain beans and remove onion, celery, and carrot.
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12
Meanwhile, combine prunes and balsamic vinegar in nonreactive pan and simmer for 15 minutes (don't boil hard).
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13
Remove prunes and chop finely.
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14
Add prunes back to vinegar.
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15
Add tamarind concentrate and chili-garlic paste to prune-vinegar mixture.
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16
If working from whole fenugreek, grind in coffee grinder to powder.
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17
Lightly grind coriander seeds.
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18
Add both to vinegar mixture.
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19
Mix well.
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20
Combine beans and vinegar mixture.
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21
Chill for 2 hours.
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22
When ready to serve, mix in 1/4 cup cilantro and top with sliced red onion.