Take mashed potato in mixing bowl, add onion, green chili, salt to taste and 1/2 teaspoon red chilli powder. Mix really well.
Grease your palm. Take lemon size portion from mixture make balls n flatten it.
Add salt to taste, 1/2 teaspoon red chilli powder and turmeric powder in gramflour and make smooth batter by adding little water.
Dip flattened potatoes in batter and deep fry in heated oil. Fry from both sides till it done. Transfer it on absorbing paper.
Aloo chop is ready to serve. Serve this hot with tomato ketchup n green chutney.
Note:- I added salt twice one in stuffing and second in batter. So add required salt to keep taste in balance.