Add roasted makhana and roasted peanuts to a food processor, pulse to make a coarse mixture.
Transfer the mixture to a bowl, add soaked sabudana and grated potato.
Add sendha namak, dried mint, amchur powder, and black pepper if using.
Mix well until the mixture starts coming together. Press some mixture in your hand to check. If it feels too loose, rest it for a few minutes.
Shape into medium tikkis or patties, then chill or freeze for 20 to 30 minutes so they firm up.
Preheat the air fryer to 180°C for 5 minutes.
Brush the tikkis lightly with oil or ghee, arrange them in a single layer.
Air fry at 180°C for 14 to 15 minutes, flipping once in between, until lightly golden and crisp on the outside.
Serve hot with vrat chutney or plain yogurt.