Step 1

Preheat oven to 200C. Line a baking tray with 2 sheets of foil large enough to enclose the loaf.

Step 2

Use a large serrated knife to cut into the top of the loaf diagonally in a checkerboard pattern (be careful not to cut all the way through).

Step 3

Spread caramelised onion into the cuts. Fill with mozzarella, brie and thyme. Brush loaf with oil. Sprinkle with sea salt.

Step 4

Wrap the loaf in the foil to enclose. Bake for 20 mins or until cheese melts. Uncover and bake for a further 5 mins or until crispy. Serve immediately.