Tahini is a paste made from ground sesame seeds. As such, it's naturally gluten-free. But please do check your jar to ensure the factory and/or seeds are not contaminated by gluten products if making this recipe for coeliacs. This fudge is a scrumptious combo of halva and fudge, which delighted my very conservative-with-a-small-C tasters.
Roasted unsalted pistachios would be a wonderful substitute in this fudge. And whilst we're going totally off-piste from traditional helwa tat-tork – hazlenuts or macadamia nuts could work, too.