To a pot add the washed lentil and all of the dal ingredients (red lentils, ginger paste, red chili powder, salt, turmeric powder, and water). Bring to a simmer.
Cook until the lentils are tender (about 20 minutes).
Use a whisk to break up some of the lentils.
While the lentils are simmering prepare the tadka.
To a pan on medium heat add oil. When the oil is starting to get hot add the cumin seeds so that they pop.
After the cumin seeds start crackling add the garlic, chili peppers, and chopped onion.
Sauté until the onion starts to change color. Add the chopped tomato and cook until the tomatoes are mushy and have changed color.
Set aside until ready to use.
Finish
Add the spinach to the dish and stir it in. Cook for two minutes.
Add the tadka to the dish and mix. The dish is now ready to serve.