Combine the cabbage and carrot in a large bowl and pour the boiling water over the mixture. Allow the mixture to steep for 5 minutes; drain well. Return the cabbage and carrot to the bowl. Mix in the spring onions, vinegar, water and oregano. Toss until all ingredients are combined. Chill for 20 minutes before serving.
To make the dressing, mix all the ingredients together and beat them with a fork until well blended.
Stir the dressing into the cabbage and carrots, sprinkle with cumin and paprika or degi mirch and serve.