Peel and cut onion, garlic, and carrot into small pieces.
Heat olive oil in a pan. Fry onions and garlic for a few minutes.
Heat 500 ml of water and mix it with approx. 1 tablespoon of vegetable broth (according to package instructions).
Rinse red lentils with fresh water before boiling. Add carrots, lentils, and tomato paste. Shortly fry everything together.
Then add diced tomatoes and vegetable stock. Bring it to boil.
Simmer at medium heat for 10 - 15 minutes. Season to taste with spices.