Add two tablespoons of ragi flour to 1 cup of water. Mix well to ensure there are no lumps. Keep it aside. If you like a thicker soup, then use 3 tablespoons of ragi flour.
Heat olive oil, and add minced ginger, garlic, and green chilies. Saute for a minute.
Then add onions. Saute until they soften and turn translucent.
Add chopped mixed veggies like carrots, green beans, bell pepper, and green peas. Saute for 2 minutes until veggies are tender and crisp.
Then add spices like turmeric powder, roasted cumin powder, salt, and pepper. Saute for a few seconds.
Add 1 cup of water (or vegetable broth) and bring it to a gentle boil.
Next, add the ragi slurry and keep stirring constantly to avoid lumps. Reduce the heat to low and let the ragi soup simmer for about 4-5 minutes. Adjust the seasoning at this stage.
Add lemon juice and coriander leaves. Mix well and switch off the flame.
Serve this soup hot, and enjoy!