Heat olive oil in a small saucepan over medium heat. Add onion and cook until soft. Add curry powder and ancho powder and cook for 2 minutes. Add mango puree and lime juice and cook an additional 5 minutes. Let cool. Place mango mixture in a food processor and add butter. Process until smooth and season with salt and pepper to taste.
Place a sheet of parchment paper or waxed paper on a work surface. Spread the butter along a long side and form into a roll about 1-inch in diameter, leaving a 1-inch border of paper. Roll up the butter in the paper and refrigerate for at least 30 minutes.
Preheat grill. Brush lobster tails with oil and season with salt and pepper. Place meat side down and grill 4 to 5 minutes or until cooked through. Remove from heat and top each tail immediately with a slice of butter.
Green Papaya Salad: Combine all ingredients except peanuts in a medium bowl until combined. Spoon onto a platter and garnish with peanuts and chopped cilantro.
Recipe Copyright 1999 by Bobby Flay. All Rights Reserved.