Heat some oil in a deep, wide pan or kadai.
Add the sliced onions and sauté until they are lightly browned.
In another deep pan or kadai, heat oil and add the shredded chicken along with salt, green chilies, red chili powder, and turmeric powder.
Sauté the chicken over medium to high heat until it begins to lightly crisp up.
Add the almost caramelized onions and freshly chopped tomatoes to the chicken.
Continue sautéing until the tomatoes are fully cooked.
Finish with a sprinkle of garam masala, fresh curry leaves, and coriander leaves.
Serve the chicken chili with any Indian flatbread or use it as a filling for sandwiches or wraps.