For garnish:
Heat the oil in a large pot over medium heat. Add onions and sauté until translucent.
Add garlic, ginger, and green chilies. Cook for 2 minutes.
Stir in turmeric, cumin, and coriander, cooking for another minute until fragrant.
Place chicken thighs in the pot, coating them well with the spice mixture.
Pour in coconut milk and add tamarind paste. Bring to a boil, then reduce to a simmer. Cover and cook for 25 minutes.
Season with salt and garnish with chopped cilantro and lemon wedges before serving.
