This recipe comes from Nancie McDermott's cookbook The Curry Book. When I prepared this soup, I followed the recipe exactly but found the soup to be a little thin, in my opinion. The flavor was fabulous - there just weren't enough potatoes! Hubby, who loves curry, agreed and we ended up eating it over rice. Originally the recipe called for 4 cups of potatoes, which just isn't very much when compared to 10 cups of liquid. If you're looking for a thinner, brothier soup, by all means go with the 4 cups of potatoes. I have beefed up the recipe and called for more potatoes based on personal preference. Hubby also suggested throwing in some cauliflower, which would be a great addition. Don't be afraid of using all coconut milk either - the taste is very subtle and really makes the soup delicious. I was hesitant at first but glad that I used it. Another nice thing about this soup is that you can make it with what you have in your pantry - no unusual ingredients.