Here's my five-star version, which is a clone of a menu item at an upscale Mexican restaurant in my town:
Use peeled and deveined raw shrimp (medium size) - marinate shrimp in the sauce from one small can of chiles in adobo (discard the chiles), a generous pinch of cayenne pepper (we like it hot!), juice of two limes, and two tablespoons of flour (thickens the mixture so it stays on during cooking). Marinate for at least 30 minutes. Preheat a skillet on high heat, add shrimp, cook 3-4 minutes or until shrimp are done. Serve in warmed white corn tortillas (2 tortillas per taco - Mexican restaurants almost always double-wrap corn tortilla tacos). Garnish each taco with a slice of avocado and a sprinkle of fresh cilantro. Amazing!