For the hob/stove:
If using dried lentils, add all ingredients to a pot and cook on a simmer for about 45-60 minutes or until the lentils are fully cooked and the vegetables are soft. Add water as you’re cooking (probably about another cup) and stir occasionally to keep the lentils from sticking to the bottom of the pan.
If using tinned lentils that are already cooked, just cook until the veg are cooked and you reach the consistency you desire!