Arrange radishes on a baking tray. Drizzle with a little olive oil and roast for 20 minutes until tender.
Add the roasted radishes, tahini, lemon juice garlic, and oil to the bowl of a food processor. Season to taste and blend to combine until thick and creamy.
Taste and adjust the seasoning if desired, or add more oil for a thinner texture. Optionally you can drizzle with extra oil. Serve with crudites or crackers.