Preheat oven to 400 degrees. Peel garlic and place in a piece of foil. Drizzle with olive oil and cover loosely. Place in oven and roast for 30 minutes. Cool.
Drain and rinse beans. Add to food processor. Add roasted garlic and lemon rind. Pulse for 10 seconds.
As the processor is running, slowly add the tahini, olive oil and lemon juice. Mix until thoroughly combined.
Transfer to a serving dish and top with mint leaves and lemon zest.