1. Cook the soaked chickpeas in a pot with water until tender.
2. Heat oil in a pan, add cumin seeds, and let them splutter.
3. Add chopped onions and sauté until golden brown.
4. Add ginger garlic paste and cook for a minute.
5. Add tomato puree, turmeric powder, red chili powder, and chole masala. Cook until oil separates.
6. Add cooked chickpeas, salt, and water. Simmer for 10-15 minutes.
7. For aloo tikki, mix mashed potatoes, green chili, garam masala, and salt.
8. Shape the mixture into patties.
9. Heat oil in a pan and fry the patties until golden brown.
10. Serve hot aloo tikki with chole on top.