Soak gelatine in cold water. Wash the lime with hot water, rub dry and grate the peel. Squeeze the lime.
Mix the yoghurt with half the lime zest, lime juice, vanilla sugar and sugar. Squeeze out the gelatine and dissolve over a mild heat. First stir in 4 tablespoons of cream, then stir into the rest of the cream.
Chill until it begins to gel.
Whip the cream until stiff and carefully fold into the cream. Chill for at least 4 hours.
Wash, clean and quarter the strawberries. Crumble meringue coarsely. Layer cream, strawberries and meringue loosely in a large bowl. Sprinkle the rest of the lime zest on top and serve immediately.