In a blender, combine grapes, cilantro, cayenne pepper and salt; puree.
In a small non-stick skillet, over medium-low heat, add puree from the blender and cook for 7 to 10 minutes until mixture turns into a thick sauce.
Serving Size 1
* Percent Daily Values are based on a 2,000 calorie diet. Your daily value may be higher or lower depending on your calorie needs.