http://www.eatingwell.com/recipes/cilantro_crema.html
From EatingWell: March/April 2008Turn an ordinary taco into something special with this creamy, herb-studded sauce in place of plain sour cream. It's traditionally made with Mexican crema, a tangy-sweet cultured cream; if it's available in your area, it can be used in place of the sour cream.
4 servings, 2 tablespoons each | Active Time: 10 minutes | Total Time: 10 minutes
Per serving : 42 Calories; 4 g Fat; 2 g Sat; 1 g Mono; 12 mg Cholesterol; 2 g Carbohydrates; 1 g Protein; 0 g Fiber; 86 mg Sodium; 49 mg Potassium
Exchanges: 1 fat