Preheat the oven to 400 degrees. Wrap the beets in foil and roast them for 45 minutes until tender. Let them cool, then peel and chop into chunks.
Add the roasted beets, chickpeas, tahini, lemon juice, garlic, olive oil, and salt to a food processor.
Blend the mixture until completely smooth, stopping to scrape down the sides as needed.
Cut each pita bread into 8 wedges.
Arrange the hummus in a serving bowl and place the pita wedges alongside for dipping.