If you haven't defrosted your langostino lobster tails yet, you can soak them in lukewarm water at this time. While the tails are defrosting, shred your cabbage and place it in a bowl
Squeeze lemon and lime juice, add salt and chopped radishes. Stir in mayonnaise. If you want less spicy slaw add in your Serrano pepper now, and place in the fridge. If you want spicier slaw stir in the peppers before serving.
MAKE THE LOBSTER
Wrap your longastino lobstertails in a paper towel or cheese cloth and lightly wring out any excess water. In a hot pan with olive oil, add longastino lobster tails.
Squeeze in juice from lime, then stir in cumin and paprika. Cook for about 2-3 minutes. Take off heat and stir in cilantro.
Add to warm tortillas and top with spicy slaw. Enjoy!