"I feel like I'm a bit redundant about curry powder but I'll just say it again: my favorite curry powder is the Sweet Curry Powder from Penzey's spices. You can use any type of curry powder here (yellow, red, hot) just make sure you like the flavor as it will come through in the soup. Also, you can play around with the type of sausage used. If using an uncooked, crumbled variety, brown it first (before the vegetables) and remove to a plate before proceeding with the recipe (and then stir it in at the end with the beans).The color of the finished soup will largely depend on what kind/color of curry powder and lentils you use. I used a blend I found with red, black, yellow and green lentils. Also, scale back on the broth if you want an ultra-thick soup; conversely, add a few more cups if you want it to go a bit further and don't mind a thinner consistency. Keep in mind it will thicken a bit off the heat (after 10 or so minutes)...."