Skinny Asparagus Soup

Ingredients

• 1 cup croutons or toasted bread cubes
• ½ tsp black pepper
• ½ cup sour cream
• 1 medium yellow onion
• 2 pounds asparagus
• 1 Tbsp olive oil
• 1 tsp garlic
• 1 tsp salt
• 6 cups low-sodium chicken stock