In a large skillet over medium high heat, add the olive oil.
Slice the chicken breasts in half lengthwise. Season all sides with the salt, black pepper, and brown sugar.
Sear the chicken for 2-3 minutes, then flip to sear another 3-4 minutes.
Add the white wine to deglaze the pan, then add the garlic, shallot, and lemongrass to saute for 4-5 minutes.
Stir in the coconut milk, lime juice, and red pepper flakes.
Reduce heat to LOW, then add the chicken and cover to simmer for 10-15 minutes.
Garnish with freshly chopped cilantro and scallions.