1. Combine first 4 ingredients in a food processor; process until smooth. Combine jalapeño sauce and onion in a small bowl.
2. Combine paprika and next 6 ingredients (through ground red pepper); sprinkle evenly over fish. Heat oil in a large cast-iron skillet over medium-high heat. Add fish to pan; cook 3 minutes on each side or until desired degree of doneness.
3. Warm tortillas according to package directions. Divide fish, onion mixture, and avocado evenly among tortillas. Serve with lime wedges.
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