In a mixing bowl (or blender), combine the chopped lemongrass, vegetable oil, fish sauce, light brown sugar, lime juice, soy sauce, and minced garlic; whisk or blend until smooth.
Place the sliced chicken in a resealable plastic bag and pour in the marinade; seal and refrigerate for 1 to 2 hours, turning the bag occasionally to marinate evenly.
Remove the chicken from the marinade and thread strips onto soaked bamboo skewers, leaving a little space between pieces.
Preheat a grill or grill pan on high for about 10 minutes, then reduce heat to medium-high.
Grill the skewered chicken until browned and cooked through, about 3 minutes per side (total about 6 minutes), flipping once.
Divide the cooked rice among bowls, top with thinly sliced baby carrots, micro kale, and the grilled chicken satay; add serrano peppers to taste.
Optionally sprinkle furikake on the rice and serve with peanut sauce if desired.