Chop the onion, capsicum, beans, coriander leaves. Grate the carrot and ginger. Keep everything ready.
Heat oil in a pan and add mustard seeds, urad dal, cumin seeds, and hing for tempering. Once they splutter, add green chilies, ginger, and curry leaves. Saute for another 30 seconds.
Next, add onions and saute until the onion turn translucent. Add the grated carrot, beans, and capsicum. Cook for 2-3 minutes till beans turn soft.
Add turmeric powder, red chili powder, coriander leaves, and salt. Saute for a few seconds and switch off.
Transfer the veggies to the batter once it cools down. Mix the batter well.
Heat a kuzhi paniyaram pan/ponganalu skillet and pour oil in each hole. Once the pan gets a little hot, pour some batter into each of the holes.
Add some more oil on the top. Close the lid and cook in low-medium heat. After a few minutes flip with the help of a butter knife and cook the other side. Vegetable paddu is ready. Serve hot with coconut, onion or any chutney of your choice.