A classic Indian dish loaded with delicious aromas.
Boil lentils in a pot with the stock. Reduce heat and add turmeric and salt, let them boil for 15 minutes, stiring from time to time. The lentils will get texture of thick puree. Remove from the heat.
Meanwhile, in a saucepan, toast cumin seeds for a couple of minutes, be careful they don't burn or will get very bitter.
Add the olive oil and when hot, reduce heat to medium and add onion. Saute a couple of minutes and add the chopped tomato. Let them cook 5 minutes.
Add the onion mix and the handful of spinach to the pot with the lentils. Cover and let it rest 5 minutes.
Taste and see if need adjusting any flavours.
Serve it with pita bread, naan bread or boiled rice.
If you prefer you could use it as a side dish of your favorite curry.