Heat the olive oil in a large pan over a medium heat
Brown the chicken legs and then remove from the pan and set aside
Put the onions, mushrooms and garlic into the pan with the chicken juices
Saute the vegetables for 5 minutes

Add in the passata, red wine, rosemary, seasoning and bay leaf
Bring to the boil
Turn down to a simmer, add in the chicken and cook for 30 minutes or until the chicken legs are cooked