Food & Cooking Recipes Soups, Stews & Stocks Soup Recipes Soba Soup with Spinach 4.0 (45) Prep Time: 15 mins Total Time: 35 mins Servings: 4 This delicious broth is loaded with nutritious vegetables such as shiitake mushrooms and spinach. Directions In a large saucepan, heat oil over medium. Add mushrooms, scallion whites, garlic, and ginger; season with salt. Cook, stirring occasionally, until mushrooms are tender, 6 minutes. Add broth and 3 cups water; bring to a boil. Add soba; reduce to a simmer, and cook 5 minutes. Add spinach; cook just until tender, about 1 minute. Add lime juice and soy sauce. Serve topped with scallion greens.