Directions

1. Coat grill rack with nonstick cooking spray. Preheat grill to medium-high direct heat (350°F to 400°F). In a small bowl stir together butter and 2 teaspoons of the lime juice. Split the underside of the lobster shells lengthwise with scissors or a sharp knife. Drizzle butter mixture into shells.
2. Place lobster, split side up, on grill. Grill, covered, 5 minutes. Turn lobster; grill 3 to 5 minutes more or until meat is opaque. Remove from grill; set aside to cool slightly.
3. Meanwhile, in a medium bowl combine oil, remaining 2 teaspoons juice, lime zest and horseradish. Add avocado, mango and onion; toss to coat. Remove lobster from shells; discard shells. Cut lobster into bite-size pieces.
4. Spoon avocado mixture into martini glasses or small dishes. Top with lobster chunks. Serve with thin lime wedges, if desired.