- Roast or boil beets until tender (about 45 minutes for roasting at 400°F or 30-40 minutes for boiling). Cool completely and peel. 
- Slice 3 of the cooked beets and place in blender with 2 cups cold water or vegetable stock. 
- Add half the diced onion, garlic cloves, 2 sliced cucumbers, salt, pepper, vinegar, and most of the dill (reserve some for garnish). 
- Blend until completely smooth, about 2-3 minutes. 
- Taste and adjust seasoning with additional vinegar, salt, or pepper as needed. 
- Chill in refrigerator for at least 2 hours before serving. 
- Serve cold, garnished with reserved onion, dill, diced cucumber, remaining diced beet, avocado, olive oil, or yogurt as desired.