boil the potato till they are soft. peel the skin and cut into medium pieces. keep aside.
finely chop green chillies, ginger, coriander leaves. also thinly slice onion and keep ready.
in a pan heat oil and add cumin seeds, mustard seeds, urad dal, red chilli and channa dal. allow to splutter
then add curry leaves and hing. fry for a minute.
now add thinly sliced onion and fry till then turn translucent.
also add chilli and ginger. fry till the raw smell of ginger goes away.
now add boiled and chopped potato and give a quick stir. also add turmeric powder, little water and salt to taste.
mash the potatoes and cook for about 4 min.
squeeze some lemon juice and garnish it with fresh chopped coriander leaves.
serve aloo bhaji hot with poori.