Tarragon-Scented Asparagus Vichyssoise

Ingredients

• 1 1/2 pounds asparagus
• 1 large leek, chopped (white part only)
• 2 cloves garlic, sliced
• 1/2 pound red potatoes, peeled and diced
• 6 cups light vegetable stock or water
• 3 tablespoons fresh tarragon, minced (or 3 teaspoons dried; divided)
• 1/2 teaspoon salt
• 1/4 teaspoon pepper
• 1/4-1/2 teaspoon ground nutmeg (to taste)