Inspiring vegetarian recipes
Try our vibrant veggie dishes, from meat-free lasagne to vegetable curry and vegetarian chilli
Heat the oven to 190C/fan 170C/gas 5. Put the onions into a deep baking dish, season well and pour in the stock. Add the thyme sprigs then cover tightly with a double layer of foil. Put into the oven for 1 hour 30 minutes until the onions are really soft but still holding their shape.
Mix the breadcrumbs with the oil until fully coated, then mix in the cheddar.
Remove the foil and heat the grill to high. Whisk together the cream and mustard, then pour into the onion dish. Put a pile of the cheesy breadcrumbs on top of each onion, then grill for 5 minutes or until the cheese and breadcrumbs are browned, and the sauce is bubbling.