Place a wide, heavy-bottomed skillet (12 inches or larger) over medium-high heat. Once the pan is hot, pour in 1½ tablespoons of oil. Immediately add the diced bell peppers and onions. Stir-fry briskly for 2–4 minutes, just until the vegetables turn crisp-tender, do not change color and develop light charred spots. Transfer them to a plate and set aside.
In the same skillet, add the remaining oil and reduce the heat slightly to medium. Add in the dried red chili, cumin seeds, fresh green chilies, and ginger cut into juliennes. Stir constantly for 10–15 seconds, just until the spices release their aroma. Take care not to burn them.
Add the chopped onions to the pan and fry, until they turn a deep golden brown - this should take about 6–8 minutes. Stir in the garlic paste along with the ground spices, followed by ¼ cup water to prevent scorching. Mix well and cook this masala mixture for 1–2 minutes, until it turns fragrant and smells toasty, and you see oil beginning to separate around the edges of pan.
Add the chicken pieces to the masala and season with salt. Mix well to coat the chicken with the masala. Cook uncovered on medium to medium high heat, without adding any water—the chicken will naturally release its own juices. Stir-fry, turning often, until the liquid evaporates and the chicken starts to brown. This stage takes about 6–7 minutes.
Once the chicken is nearly dry, stir in the tomato sauce, ketchup, and sriracha. Cook while stirring continuously for 3–5 minutes, until the sauce thickens, clings to the chicken, and oil once again begins to separate. The chicken should be glossy and coated, with no runny gravy but don't dry out too much.
Return the stir-fried bell peppers and onions (along with any juices collected on the plate) back into the pan. Toss everything together and cook for 2–3 minutes, just enough to let the flavors combine while keeping the vegetables slightly crisp.
Sprinkle chicken jalfrezi with garam masala and freshly chopped cilantro. Give everything a final toss. You could also add a dash of kasuri methi(gives a nice umani aroma!)
Serve chicken jalfrezi with indian flatbreads such as naan or plain paratha. A side of kachumber salad really goes well. You can also pair it with jeera rice.