In a large pot, heat olive oil, add chopped onions and sauté until onions are translucent and soft.
Add minced garlic and sauté 2 more minutes.
Add celery, carrots, potato, kale, paprika and herbs and sauté for a few more minutes stirring frequently.
Add lentils, water, crushed tomatoes and tomato paste. Bring to a boil, cover and simmer over low heat for 25 minutes (If you are using a pressure cooker, cook under pressure for 7 minutes and use a natural releasing method.).