Cut the onion, celery, carrot and garlic into tiny pieces.
In a large pan, heat the olive oil and gently soften the chopped vegetables.
Add the herbs, stir for a few seconds, then add the tomato purée and bay leaf and stir again.
Add the tinned tomatoes, then one and a half tin of water. Add the stock cube and bring to the boil.
Cook for 20 minutes, then remove the bay leaf. Using a stick blender, process the stew until you get a thick, textured sauce.
Add the Quorn pieces and cook for 10 minutes, then add your chosen green vegetables and cook for another 5 minutes or so.
Serve with fresh herbs scattered on top.