Chai-Spiced Sweet Potato Soup

Ingredients

• 2 pounds Japanese yams or white sweet potatoes
• 3-4 Tbsp. ghee, divided
• 1 tsp. kosher salt
• 1 medium yellow onion, diced
• 4 cloves garlic, minced
• 1/2 tsp. kosher salt
• 1/2 tsp. group cinnamon
• 1/2 tsp. ground ginger
• 1/2 tsp. ground cardamom
• 1/2 tsp. ground coriander
• 1/8 tsp. ground nutmeg
• 1/8 tsp. white pepper
• 4 cups low-sodium vegetable broth
• 1 14-ounce can full-fat coconut milk