In a large pot add the oil and on a high heat, add all the vegetables and a little bit of salt, reduce the heat, cover and cook for 15 minutes stirring occasionally.
Add 1.5 litres of stock, lentils, apricots, cumin, thyme and some black pepper. Bring to the boil, stirring regularly to make sure nothing sticks to the bottom of the pot. Turn the heat down and simmer for about 40 minutes until all the vegetables and lentils are cooked ( the lentil will have turned a pale yellow in colour).
Remove from the heat and blend with a stick blender until you have a smooth consistency. If the soup is too thick add some more stock or a bit of water. Add the lemon juice and check the seasoning.
Serve with some fresh coriander or parsley and some bread.