Heat the oil in a large casserole or pan; add the mince and onion and sauté over a high heat for 5 mins until the mince is lightly browned.
Add the garlic and mushrooms and sauté for a further 3 mins.
Add the remaining Ingredients and season to taste.
Bring to the boil, cover and simmer for 20 mins, removing the lid halfway through cooking or until the mushrooms are tender and the sauce lovely and thick.
Remove bay leaf, adjust the seasoning as necessary.