- In a large saucepan, soften the onion and garlic in the oil. Add the broth, broccoli, and asparagus. Bring to a boil. Simmer, uncovered, for about 15 minutes or until the vegetables are tender.
- Add the spinach and simmer for about 1 minute. In a blender, purée the soup until smooth. Strain. Add broth, if needed. Season with salt and pepper. To serve, top with spinach leaves and crumbled feta cheese.