1/2 tablespoon olive oil, plus more for brushing grill
2 jalapeno chiles
24 scallions
3 cups blueberries (about 1 pound), picked over and rinsed
1/2 small red onion, finely chopped
3 1/2 tablespoons freshly squeezed lime juice (2 to 3 limes)
1/2 teaspoon coarse salt
1/2 cup loosely packed basil leaves, very thinly sliced, plus whole leaves for garnish
1/2 cup loosely packed cilantro leaves, roughly chopped, plus whole leaves for garnish
2 pounds chicken cutlets
Pinch of cayenne pepper