
In the recipe, you sauté some onions (I substituted half of the onions for red bell pepper), then add beans, stock, and chipotle pepper (either dried or canned). Basically you just simmer that, then puree some of it if you like (I do). I added the step of browning some bacon and adding it after pureeing. Couldn't hurt, right? Finish it by squeezing in a bit of lime juice just before serving. Bittman suggests some sour cream as well, but I didn't have any, so I used some ricotta salata I had in the fridge--not a bad combination at all, though I must admit that sour cream or even a bit of yogurt would be better.