Healthy Sweet Potato Waffles

Name: Healthy Sweet Potato Waffles
Total time: 15 min
Yield: 2 servings
Ingredients: 1/4 cup buttermilk; 2 large eggs; 2 1/2 cups sweet potatoes mashed; 3 tablespoons spring onions chopped; 1 cup parmesan cheese; 1/2 cup all purpose flour; 1/2 teaspoon baking powder; 1 teaspoon baking soda; pepper; sea salt; olive oil spray light extravirgin, for cooking; sour cream for serving