Vegan Black Bean Burger Soup

Heat olive oil in a medium stockpot over medium-high heat. Add onion, celery, and garlic and saute until soft, about 5 minutes. Stir in tomato paste, mustard powder, salt, and pepper. Add vegetable broth and sweet potatoes and bring to a boil, uncovered. Cook, stirring occasionally, until potatoes are tender, about 6 minutes.

Reduce heat to low and add black beans, vegan "ground beef," spinach, and nutritional yeast. Cook until spinach has softened and soup is heated through, about 10 minutes.