Chilies Preparation:
Wash and dry the chilies. Using the pointy part of a knife, make a long, lengthwise slit without halving the chili.
Deseed the cut chilies using a small spoon or knife and set aside.
Spice Mix:
In a small bowl, add chaat masala, cumin powder, red chili powder, and salt. Mix well.
Gently open a cut chili with your fingers without breaking it, sprinkle the chaat masala mix inside, and set aside.
Besan Coating:
In a mixing bowl, combine besan, turmeric, red chili powder, hing, soda, and ajwain.
Gradually add water to create a thick but slightly droopy texture. The batter should coat the chili well when dipped. Keep aside.
Onion Mix:
In a bowl, combine chopped onion, chopped coriander leaves, red chili powder, cumin powder, chaat masala, rock salt, and lime juice. Mix and set aside.
Cooking Process:
Heat oil in a deep pan for frying.
Once the oil is hot enough, dip a chili by holding the stem with your fingers into the besan batter, ensuring it is well-coated on all sides. Carefully drop it into the hot oil. Repeat with 1-2 more chilies. Fry 2-3 chilies at a time in a batch.
Use a slotted spoon to turn the chilies in the oil, frying each side until golden brown. Drain and place on kitchen paper towels to remove excess oil. Continue the same method to fry additional chilies.
Serving:
Arrange the mirchi bajjis on a plate. Make a lengthwise slit to open the fried mirchi bajjis, stuff and top each with the onion mixture.
Sprinkle additional chaat masala mix over them and serve with coconut chutney, tomato chutney, or masala chai. Enjoy!