For the hummus, place the tahini, garlic, lemon juice, olive oil, and water in a food processor and process until smooth. Add the chickpeas, parsley, salt and pepper and process for a few minutes until very smooth. If necessary, add more oil, water or lemon juice to suit your preferred consistency and taste. Taste for seasoning.
Pour into a bowl and lightly stir the paprika through. Drizzle with olive oil to serve.