Preheat the slow cooker.
Peel your vegetables and chop into cubes.
Add everything to the slow cooker.
Add the stock cubes, by either dissolving in boiled water or crumbling into the soup and covering the ingredients with boiling water.
As a guide reduce the standard recipes liquid by approximately one third. See table across for quantities of stock needed.
Place the lid on the slow cooker and refer to the original recipes cooking time. If the recipe normally takes 15 to 30 minutes, cook on low for 4 to 6 hours or on high for 1 to 2 hours. If the recipe normally takes 30 minutes to 1 hour, cook on low for 5 to 7 hours or on high for 2 to 3 hours.
If using barley, lentils, pasta or rice, add these to the slow cooker 1 hour before serving and allow to cook.
If the recipes use milk, add the milk at the end when the vegetables are cooked.