Place roasted beets, tahini paste, lemon juice, 2 tbsp (30 mL) olive oil, garlic, cumin, coriander, salt and pepper in food processor; blitz to desired texture. Add additional tahini, lemon juice or water for a smoother dip, if desired. Transfer to serving bowl. Drizzle with remaining oil and sprinkle with a pinch of cumin. Store refrigerated in airtight container for up to 2 days.