Preheat large pot on medium heat and swirl oil to coat. Add onion and cook for 4-5 minutes, stirring occasionally.
Add broccoli, rice, salt, pepper, broth and stir. Cover, bring to a boil, reduce heat to low and simmer for 15 minutes or until broccoli is fork tender.
Turn off heat. Mash broccoli with a potato masher until chunky. Add feta cheese, lemon juice, garlic and dill. Stir and serve soup hot.
Notes
Store: Refrigerate leftovers in an airtight container for up to 4-5 days. Cover and simmer on low heat for about 5 minutes or until warmed through.
Freeze: Freeze in an airtight container with room for expansion for up to 3 months.