Wash the kodo millet 2–3 times and soak it for 10 minutes.
Heat oil in a pressure cooker and add mustard seeds.
Add chana dal and urad dal, then saute for few seconds.
Add sliced onion, green chilli, curry leaves, and grated ginger. Saute until onions become soft.
Add carrot, beans, and peas. Mix well.
Pour 1.5 cups water and add salt along with a pinch of turmeric powder.
Add soaked varagu arisi and coriander leaves. Mix gently.
Close the cooker and cook for just one whistle.
Let the pressure settle naturally and gently fluff the upma before serving.