To make dressing: Open up the flavor of the paprika by gently warming it with the oil in a small skillet over medium heat. You want it to be fragrant, but not toasted. One to 2 minutes should do it.
Fit a food processor with the flat steel blade and turn it on. Pour in the lime juice and drop in the garlic; process for 3 seconds. Turn off machine, scrape down sides of bowl, and add the mayonnaise, buttermilk and paprika, and process for another 2 seconds. Add salt and pepper to taste. (If working by hand, mince the garlic and blend it with the remaining dressing ingredients.)
To make the slaw: Replace the flat steel blade with a thin slicing disk. Slice the cabbage and onion into the dressing at the bottom of the processor bowl. Scrape the slaw into a bowl or storage container and serve, or refrigerate overnight. (If by hand, thinly slice the cabbage and onion and toss with the dressing.)
To serve, drain off any excess liquid and taste slaw for seasoning. Place in a serving bowl and fold in the cilantro. Serve cool, but not ice cold.
Nutrition information per each of 8 servings:
Calories210Fat18 gSodium146 mgSaturated fat3 g