Cook the aromatics:
Heat the oil in a large skillet over medium heat. Add garlic, shallot, and ginger. Cook 1–2 minutes until fragrant.
Cook the chicken:
Add ground chicken, breaking it apart with a spoon. Cook 5–6 minutes or until no longer pink.
Season the mixture:
Stir in lime juice, soy sauce, brown sugar, chili flakes, and chicken broth. Simmer 2–3 minutes to let the flavors develop.
Finish with herbs:
Remove from heat. Stir in chopped cilantro and toasted rice powder if using.
Assemble bowls:
Add jasmine rice to serving bowls. Top with sliced cucumbers and spoon the warm chicken larb over top.
Serve:
Add lime wedges if desired and enjoy immediately