Chop one large onion and mince the garlic.
Fry the onion and garlic in vegetable oil in a deep pot for about five minutes, until the onion is soft.
Add the canned tomatoes, lentils and water, give a good stir.
Add salt, oregano, sugar and white pepper.
Bring the sauce to boil, then let simmer under lid 15-20 minutes.
While the sauce is cooking, shred the carrots using the largest side of your grater to avoid too small pieces.
Wash and drain the spinach in a colander.
Add the carrots and spinach to the sauce, stir and let the spinach wilt into the sauce. This takes only a few minutes.
Taste and add more salt and pepper as needed.
Serve over your favourite pasta shapes.