Thinly slice and mince the shallots, garlic, and lemongrass to create the aromatics. To make the sauce, mix together the fish sauce, honey, pepper, and arrowroot powder. Lastly, pat the chicken dry with a paper towel.
Heat the pan over medium-high heat. Add oil to the pan and wait for it to get hot and shimmery. Add chicken thighs to the pan and leave them alone. Cook the chicken for about 5 minutes. When done, turn the heat to low and remove it from the pan. Cut the chicken into bite-sized pieces.
Sauté the shallots, garlic, and lemongrass for about 1 minute.
Finish cooking the chicken with the aromatics until cooked, about 2 to 3 minutes. Serve with a side of sliced cucumbers and rice!