Mexican Margarita Shrimp

Place shrimp in a shallow, glass dish. Combine lime juice and next 5 ingredients; add to shrimp and stir. Marinate, stirring occasionally, for 10 minutes. Remove shrimp from marinade, reserving marinade, and thread onto 4 (15-inch) skewers, running skewer through each shrimp twice. Transfer marinade to a sauce pan and bring to a boil. Reduce heat and simmer 5 minutes; set aside. Coat grill rack with vegetable cooking spray. Place kebobs on grill rack 4 to 6 inches over medium hot coals. Grill, turning once, just until shrimp is opaque, allowing about 3 minutes on each side. Remove shrimp from skewers and arrange over rice; spoon some of the marinade over each serving. Garnish with lime slices.