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Saute the onion in the oil for 5 minutes. Turn flame to very low and add the garlic and chilli powder, cumin and oregano. Cook for a few minutes, stirring constantly. Add 1/4 cup tomato sauce and fry a few more minutes. Mash beans. Add tomato sauce mixture and mash some more.
Add the salt, reserved bean juice, onion, peppers and pepper juice.
Whip with whisk. Serve with corn chips.
posted by Mr Falafel