In a medium pot, over medium heat, sauté the onions, garlic and ginger.
Add in the tomatoes. Cook for a few minutes.
Add the coconut milk and chicken.
Cover the pot and bring to a boil
Once it boils, add the curry and turmeric powder. Give it a good mix. Add salt and pepper if needed.
Turn off the stove. Add the spinach.
Serve. Garnish with cilantro and drizzle lemon juice overtop.