In a large skillet, heat the oil and saute the onion until translucent.
Add the cumin seeds and saute for 30 seconds.
Add the garlic and fry for 15 seconds until fragrant.
Now add the chicken, and cook on medium high heat for 3-4 minutes or until the chicken has changed color.
Now add the salt, chicken cube, and the other spices.
Cook for 5-7 minutes on medium high heat, while stirring, or until you can see the oil separating from the curry.
Add the green chillies and the crushed tomatoes, stir, and cover the skillet. Lower the heat to low, and cook for 10 minutes.
Remove the lid, and add the sliced bell capsicum and onion.
Cook for 2 minutes to let the flavours blend. Serve with rice or naan.
Notes
Chicken: You can substitute the chicken breasts with chicken thighs cut into cubes.
Adjust the spice level: Skip the green chilies and red chili powder to reduce the heat level in this curry. You can also add a bit of greek yogurt or peanut butter to make this curry mild.
Canned Tomatoes: I like to use a can of crushed tomatoes for this recipe, but you can easily use 2-3 fresh tomatoes for this recipe. Just blend them in a small chopper or blender before using.
Storage: You can store this curry in fridge for up to 2-3 days.