Ingredients

3slicesourdough bread

4tbspunsalted butter

1½lbswhite mushrooms

2portobello mushrooms,stems discarded

2largegarlic cloves

salt and freshly ground white pepper

6cupvegetable broth,or water

¾cupheavy cream

12dillsprigs

Preparation

Preheat the oven to 300 degrees F. Bake the bread slices on a baking sheet for about 1 hour and 40 minutes, until deeply browned.

In a pot, melt the butter.

Add the mushrooms and the garlic; season with salt and pepper.

Cover and cook over moderate heat, until the mushrooms are softened.

Add the broth and half a cup of the cream; bring to a boil.

Cover and simmer until the mushrooms are tender.

Add the toasted bread to the soup; simmer until softened.

Working in batches, puree the soup in a food processor.

Return the soup to the pot, season with salt and pepper and keep warm.

In a saucepan, bring the remaining cream to a boil.

Remove from the heat; whisk until frothy.

Ladle the soup into bowls, top with the frothed cream, garnish with the dill and portobello gills and serve.