Be careful with the serrano chiles: you want a little heat and sizzle but not for it to take over the dish. Use latex gloves when handling them. Do not rub your eyes or touch your face with hands that have handled chile peppers. It will burn and be unpleasant for the next 30 minutes. Try to use a dark green lime to garnish. Yellow limes with brown spots will kill your presentation. This dish can also be made very easily into larger serving portions. Just remember to keep the balance and ratio of shrimp to vegetables.