Mash potatoes in a large bowl.
Add onion, fresh coriander, mint, green chilies, and lemon juice.
Season with achar masala, dry mango powder, red chili and salt. Mix until well combined.
Place a samosa wrap on a clean, dry surface and put a portion of the potato filling in one corner of the samosa patti and fold into a triangle.
Apply a little water at the edges and seal it.
Repeat with the remaining wraps and stuffing to make more samosas.
Heat the oil in a pan over medium heat.
Deep-fry the samosas in batches till they turn golden brown in colour from all sides.
Drain on absorbent paper. Achari Aloo Samosa is ready to serve. ENJOY!