If using wooden skewers, soak them in hot water for 15 to 20 or as instructed in the package.
Cut the paneer, red bell pepper, green bell pepper, and onion into even bite-sized cubes, approx 1 to 1.25 inches. Make sure the paneer pieces are not thick.
Add the yogurt, mustard oil, crushed kasoori methi, tandoori masala, chaat masala, besan, salt, black salt, ginger garlic paste, and red chili powder.
Mix well without any lumps.
Now add the cut vegetables to the prepared marination and mix well. Let it marinate for 30 mts to 45 mts.
Then arrange the marinated paneer, bell peppers, and onion pieces on the wooden pieces alternatingly. I start with bell peppers, then add the paneer and onion and alternate. I make sure to have atleast two paneer pieces in one wooden skewer.
Preheat the air fryer for 5 minutes at 370 deg F. Then arrange the wooden skewers in the air fryer basket. Mine could hold only five, so I kept only five.
Air fry them for 4 minutes at 370 deg F, flip them, and air fry them for 4 minutes at 370 deg F.
This timing is sufficient, but I always air fry at 400 for 2 minutes to get that charred effect.
Cook the remaining paneer skewers in batches in a similar fashion.
Squeeze some lemon juice and enjoy it with green chutney.
Notes
Adjust the salt and spices to taste.
I did not roast my besan/chickpea flour. You can slightly roast it too. Make sure there aren't any lumps in the besan.
I usually marinate the paneer for about 30 to 45 mts, but you can marinate them for up to 24 hours.
Please check the substitutions and variations section for other options and alternatives.
Oven instructions: You can broil the paneer skewers at high temperatures for 12 to 15 minutes.