Wash and cook the beets by boiling or roasting until fork-tender, then cool, peel, and chop into small pieces.
Prepare all ingredients by measuring and crumbling the feta cheese.
Add chopped beets, feta cheese, yogurt, olive oil, lemon juice, garlic, salt, pepper, and cumin powder into a blender.
Blend the mixture until smooth and creamy, stopping to scrape down the sides as needed.
Taste the dip and adjust seasoning by adding more lemon juice, salt, or olive oil if required.
Blend again briefly to combine any adjustments.
Transfer the dip to a serving bowl and refrigerate for at least 30 minutes before serving.