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1
Put peanuts, ginger, garlic and chilies into container of an electric blender.
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2
Blend as finely as possible.
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3
Spoon and scrape mixture into a mixing bowl.
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4
Add turmeric, red pepper, cumin, coriander, salt, sugar, garam masala and 2 tablespoons of oil.
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5
Blend well with fingers.
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6
Cut potatoes lengthwise, slightly more than halfway down.
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7
Give potatoes slightly more than a quarter turn and make a similar cut.
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8
The cut portion can be opened slightly to provide space for stuffing.
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9
Fill the cut sections of each potato with equal portions stuffing.
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10
Peel onions.
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11
Cut each, slicing down with a knife almost but not quite through to the bottom.
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12
Give each onion a quarter turn and slice in similar fashion.
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13
Open up onions and stuff with spice mixture.
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14
Trim off ends of eggplants.
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15
Cut each eggplant crosswise in half.
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16
Partly slice open each piece so that it can be opened up but remains hinged at the bottom.
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17
Fill halves with equal portions of spice mixture.
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18
Put remaining cup of oil in bottom of a casserole and arrange vegetables, stuffed side up in layers, one atop the other.
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19
Cover casserole closely with a shallow pan that fits more or less compactly.
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20
Pour an inch or so of water in pan.
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21
Heat vegetables until they start to cook in the oil.
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22
Let cook over low heat until potatoes are tender, 30 to 35 minutes.
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23
Stir gently, if at all, as vegetables cook.
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24
Sprinkle with coriander before serving.