Japanese Sweet Potato Soup with spinach and rosemary

Name: Japanese Sweet Potato Soup with spinach and rosemary
Prep time: 5 min
Cook time: 28 min
Total time: 33 min
Cuisine: Asian, Japanese
Ingredients: 1 large japanese sweet potato - diced; 1 shallot - quartered; 4 garlic cloves - peeled; 4 sprigs rosemary - finely chopped (sub 1/2 teaspoon dried rosemary); 4 cups vegetable broth; ¼ cup hemp seeds; 2 tablespoons miso (can sub 1 tbsp soy sauce or additional salt); 1 generous handful baby spinach (about a cup); juice from ½ lemon; salt/pepper to taste