Heat a medium-sized saucepan over medium heat. Melt the tablespoon of coconut oil. When oil is hot, add the onion. Cook approximately 4 minutes, until onion is soft and just beginning to brown. Add 2-3 tablesoons of spice blend and stir. Add garlic and ginger, cooking 30 seconds until fragrant. Add sweet potato, stir, then pour in broth. Bring to a boil, then cover for 10 minutes.