Place first three ingredients in a blender and puree until smoot. Heat a large nonstick skillet over medium high heat. Coat pan with cooking spray and add shrimp. Toss shrimp to coat with spray and sprinkle with the cumin and salt. Saute shrimp 4 minutes or until done, stirring frequently. Transfer to a serving platter.
Reduce heat to medium and add half and half mixture to pan. Cook 1 minute, stirring constantly. Pour sauce over shrimp and sprinkle with cilantro.