Mushroom Soup with Toasted Bread

Name: Mushroom Soup with Toasted Bread
Ingredients: 3 slice of sourdough bread; 4 tbsp. unsalted butter; 1½ lb. white mushrooms; 2 portobello mushrooms — stems discarded; 2 large garlic cloves; Salt and freshly ground white pepper; 6 c. vegetable broth or water; ¾ c. heavy cream; 12 Dill sprigs