Finely chop the onion, garlic.
Heat the oil in a pan, then gently fry the onion and garlic for 5 minutes or until soft.
Meanwhile, peel the turnips and carrots, then chop them roughly. Chop the bell pepper too.
Add the chopped veggies to the onion, stir for a minute, then add enough stock to cover them well.
Bring to the boil, then cover and simmer for 20 minutes.
Turn off the heat and add the parsley.
Using a hand-held blender or liquidizer, process the soup until smooth.
Taste and season with salt and pepper, if needed.
Serve warm.