Smoky Sweet Potato Soup

for the soup

• 2 Tbsp butter or substitute olive oil
• 1.7 lbs sweet potato about 2 medium-large sweet potatoes, chopped
• 1 yellow onion medium, roughly diced
• 4 cups chicken stock 32 ounces, or substitute vegetable stock
• 1/2 tsp salt
• 2 tsp smoked paprika
• 1/2 tsp ground nutmeg
• 1/2 tsp garlic powder
• 1/4 tsp ground coriander
• 1/4 tsp cumin ground

for the lime yogurt drizzle

• 1/2 cup Greek yogurt
• lime zest of 1
• lime juice of 1/2 lime
• salt small pinch