Leek Soup with Brie Toasts

Ingredients (11)

• 6 medium leeks (white portion only), thinly sliced
• 1/2 pound sliced fresh mushrooms
• 1/2 teaspoon dried tarragon
• 1/4 teaspoon white pepper
• 2 tablespoons plus 6 teaspoons butter, softened, divided
• 1 garlic clove, minced
• 7-1/2 teaspoons all-purpose flour
• 4 cups chicken broth
• 1/2 cup heavy whipping cream
• 12 slices French bread or bread of your choice (1/2 inch thick)
• 1 round (8 ounces) Brie cheese, cut into 1/4-inch slices