In a large mixing bowl, mash the boiled potatoes until smooth. Add the cooked rice, cornflour, cumin seeds, chili flakes, oregano, salt, chopped basil, and coriander. Mix well and knead until everything comes together into a soft dough.
Drizzle 1 tbsp oil over the dough and gently knead it once more. Shape it into a smooth ball.
Place the dough on a clean work surface and flatten it into a sheet about ½ inch thick.
Using a sharp knife, trim the edges to form a neat square.
Gently cut the dough into small, finger-sized pieces.
Heat oil in a deep pan over medium heat. Fry the potato rice fingers in batches for 4–5 minutes, turning occasionally, until golden and crispy. Avoid overcrowding the pan.
Transfer the crunchers to a paper towel-lined plate to drain excess oil. Serve hot and crispy with your favorite dipping sauce!