Lentil soup

I’ve been making this soup for many years. It’s very simple and you can feel it doing you good.

250g brown lentils
5 cups cold water
1 onion diced
½ capsicum (red or green) diced
2 tomatoes diced
Oil
1 ½ cups stock
2 tbl vinegar

Cook lentils in water. Saute onion, capsicum and tomato in oil. Add to cooked lentils and cooking liquid. Add stock and vinegar. Cook approx 30 mins.