Mix the chicken marinade ingredients and set aside while you chop your ginger and onion. I usually just let it sit for 20 minutes, but you can do more.
Heat a pan on medium high heat and before you add the oil add your crushed pepper into it, dry roast it until it smells deeply aromatic
Now add 3-4 tbsp of oil and your diced onion, cooking on medium heat for 4-5 minutes or until the edges take on colour.
Add your ginger into the pan and cook until the edges of the ginger change colour (about a minute or two) - your onions will further caramelize and that's ok.
Now stir in your marinated chicken and saute until the color changes.
Add your half cup water to the chicken ad simmer, covered, until tender - 25 minutes or so.
Once the chicken is cooked add in your lemon segments and green chilies and taste and adjust seasoning to taste with salt/pepper/more bhunna zeera powder
Garnish with chopped cilantro and serve with chapati.
Video
Notes
ginger: I use fresh here for the bite but also the flavour which is more aromatic than a paste. If you don't feel like finely dicing ginger then grating it using a microplane grater is the next best option.
bhunna zeera or roasted cumin powder is one of those game changing ingredients that takes 5-minutes to prep. How I make mine is linked here https://body-shift.today/roasted-cumin-powder-a-5-minute-fix/%3C/li%3E
If you don't have any and don't want to make a big batch then I suggest you dry roast cumin seeds before dry roasting the pepper and crush them lightly with a mortar and pestle. In a pinch you can also dry roast cumin powder.