Cool the potato: Boil the Russet potato until fork-tender, then let it cool completely. Peel and mash. Reserve about ¼ of the potato for the filling.
3 large Russet Potato
Make the filling: Mix the reserved potato with boiled chana dal, fennel powder, garam masala, red chili powder, amchur, anardana powder, roasted cumin powder, and salt.
¼ cup Chana Dal, ½ tsp Fennel Seeds Powder, ½ tsp Red Chili Powder, ½ tsp Roasted Cumin Powder, 1 tsp Garam Masala Powder, Red Chili Powder, Salt, 1 tsp Mango/Amchur Powder, ¼ of the boiled potato
Make the outer potato mixture: Mix the remaining mashed potato with salt and enough cornflour to help it hold together. Rice flour can be used instead.
2-3 tbsp cornflour, salt
Shape the tikkis: Divide the potato mixture into 6 portions. Flatten each portion, add some filling in the center, seal, and gently flatten into a thick round tikki.
Heat the oil: Heat oil until properly hot before adding the tikkis.
Oil
Fry: Deep-fry the tikkis until golden brown and crisp on both sides. Drain on paper towels.
Assemble the chaat: Place the hot tikkis on a plate. Top with yogurt, add spices: chaat masala, red chili powder, salt, and roasted cumin powder.
1 cup Yogurt, ½ tsp Chaat Masala, ½ tsp Red Chili Powder, ½ tsp Roasted Cumin Powder
Finish: Add tamarind and green chutney, and garnish with some boondi or sev. Serve immediately.
3 tbsp Tamarind Chutney, 3 tbsp Green Chutney, 2 tbsp boondi