Marinate the chicken in a bowl. For marination, use 1 tsp of each ground spice– turmeric powder, red chili, and salt. Add a half cup of yogurt, mix the medley well and leave it for 30 minutes so that the flavors mingle effectively.
After 30 minutes, heat the oil in a pan and add chopped onions. Cook the onion on medium heat until it turns golden.
Add the marinated chicken and 1/2 tsp of garlic paste into the pan, stirring the stew. Crank up the heat and cook for 2 mins. The garlic paste boosts the chicken's flavor, making it extra tasty.
Toss tomatoes, pickling spices (ground form), and cardamom. A splash of water spreads to spread the spice's flavor. Simmer on a medium flame for juicy chicken. Stir, and wait 3-4 mins. You can use a mortar, pestle, or machine grinder to grind all Achari Masala spices.
Check after 3-4 mins; add half a glass of water if oil separates. Sauté for 13-15 mins until the chicken is tender and juicy.
Lastly, Remove the seeds from green chilis, stuff them with chat masala, and throw them on the curry. This is an optional step that you can also skip. Voilà! Our chicken curry with pickling spices is ready to serve.