1. Melt the butter in a large casserole dish and add the onions, thyme and season with salt and pepper. Cover with a lid and fry slowly and gently, stirring regularly for about 45 minutes or until very soft and caramel brown.

2. Onions are pretty amazing because they’re packed with prebiotic fibre, so this dish will be oozing with gut loving greatness.

3. Stir in the garlic and fry for 30 seconds. Then stir in the corn flour, add the stock and stir until it is boiling. Simmer for 20 minutes.

4. Whilst the soup is simmering away, preheat the oven to 200°C.

5. Mix half the cheese with the mustard and plenty of black pepper. Spread the mixture onto the gluten free bread then place each slice on the surface of the soup.

6. Sprinkle over the remaining grated cheese. Did you know that Gruyere contains probiotics making this soup an easy cheesy way to keep your gut happy!

7. Place the fibre jammed soup in the preheated oven for 15 minutes or until the cheese is perfectly browned and the soup is bubbling. If you close your eyes, the warming smells will be enough to make you believe you are on a cobbled street in Paris. Bon appetit!