Place mung beans in a pot with water, bring to the boil then lower heat and simmer for 20 minutes until beans are soft and cooked through. Drain and set aside, allow to cool for 15 minutes.
Add the mung beans to a food processor and pulse for a minute until a fluffy crumb forms. Add lemon juice, lemon zest, tahini, garlic, basil and oil and blend for one minute. Slowly add water to achieve the desired dip consistency.
Add salt and pepper and mix for a further 30 seconds. Taste and adjust seasoning to your liking – adding more lemon juice, salt and pepper, if needed.
Place dip into a bowl swirling the surface. Drizzle with olive oil, top with basil and serve.