Peel the baby onions, and remove the tops and tails, but otherwise leave whole. Also top and tail the baby carrots.

Heat the oil in a large pan (if you use a large casserole dish that can also go in the oven, that will save on washing up!), and add the mushrooms, baby carrots and baby onions. Cook over a medium heat for 5-10 minutes, adding the garlic for the last couple of minutes of cooking time. The mushrooms should be soft and should have released their juices. The carrots and onions will still be quite hard.

Add the red wine, and turn up the heat. Simmer for a few minutes, then add the remaining ingredients. Mix well to combine.

If needed, transfer the mixture to an oven-safe casserole dish. Cover with a lid or some foil, and bake at 190°C (Gas Mark 5 / 375°F) for around 40 minutes, or until the carrots and onions are cooked to your liking. Check the seasoning, and serve hot.