Blend soaked dalia with green chilli, ginger, cumin seeds, salt, and a little water until smooth.
Add sifted gram flour and mix well.
Add onion, carrot, tomato, capsicum, coriander, mashed potato, turmeric, red chilli powder, oregano, and garam masala. Mix well.
Add baking soda and lemon juice just before cooking and mix gently.
Heat and lightly grease an appe pan.
Add about 1 tablespoon batter to each cavity without overfilling.
Cover and cook for 2–3 minutes.
Lightly brush the tops with oil, flip, and cook for another 2 minutes without covering.
Serve warm with chutney or yogurt.