1. Place first 3 ingredients in a blender; process until smooth.
2. Heat a large nonstick skillet over medium-high heat. Coat pan with cooking spray; add shrimp. Coat shrimp with cooking spray; sprinkle with cumin and salt. Sauté 4 minutes or until shrimp are done, stirring frequently. Transfer shrimp to a serving platter. Reduce heat to medium, add half-and-half mixture to pan, and cook 1 minute, stirring constantly. Pour sauce over shrimp; sprinkle with cilantro. Serve over linguine, if desired.