15 minutes. Preheat the oven to 400ºF. If the saucepan is ovenproof (if not, transfer to an earthenware soup tureen), place the bread slices on top, sprinkle with Gruyère and then drizzle the ...

Gently heat through and adjust the seasoning if necessary. Serve in warm bowls or a soup tureen and garnish with a swirl of cream, some fresh thyme leaves and freshly ground black pepper.

Taste and correct the seasoning if necessary. Serve in soup bowls or in a soup tureen garnished with a blob of whipped cream, sprinkle with thyme leaves and thyme or chive flowers.

What does soup have to do with the origins of life? It turns out that the recipe for a rich soup resembles the recipe for life as we know it. Each generation of stars enriches the cosmic broth out ...