Prepare outdoor grill for direct grilling over medium heat.
Meanwhile, in blender, combine lime juice, garlic, ginger, jalapeno, sugar, 1/4 teaspoon salt, and 1/8 teaspoon pepper. Blend mixture until pureed. Stir in yogurt and mint.
Sprinkle remaining 1 teaspoon salt and 1 teaspoon pepper on both sides of lamb chops. Place chops on hot grill rack; cook 6 to 8 minutes for medium-rare, turning chops over once.
Serve lamb chops with mint chutney.
Makes 8 main-dish servings.