
Ingredients
- 170g unsalted butter, at room temperature, plus extra for greasing
- 55g icing sugar, plus extra for dusting
- 285g plain flour
- 250ml lime juice
- 1 large lemon, zested and juiced
- 3 hibiscus tea bags
- 450g caster sugar, plus 200g for the candied limes (optional)
- 6 large eggs, plus 1 large yolk
- 3 limes, thinly sliced into 12 rounds, plus a little zest (optional)
Method
Step 1
Preheat the oven to 170°C/150°C fan/gas 3. Grease and line a 23cm x 33cm baking tin.Step 2
For the base, put the icing sugar, 215g of the flour, 170g butter and a pinch of salt in a bowl; beat with an electric whisk to form a smooth dough.Step 3
Press the dough evenly into the base of the tin, smoothing it with the bottom of a small glass or mug. Bake for 20 mins (approx.) until lightly golden. Remove and reduce the oven temperature to 150°C/130°C fan/gas 2.Step 4
Meanwhile, for the filling, gently heat the lime and lemon juices and hibiscus tea bags in a medium pan until steaming. Set aside until just warm, then discard the tea bags.Step 5
In a large bowl, whisk the remaining 70g flour and the 450g caster sugar together. Gradually stir in the warm citrus infusion until the sugar dissolves. In a separate bowl, whisk the eggs and extra yolk, plus a pinch of salt, then stir into the citrus mixture until fully combined.Step 6
Pour the filling over the hot base; return to the oven for 40 mins (approx.) until set with no wobble. Leave to cool completely in the tin, then chill for at least 2 hrs.Step 7
For the candied lime slices (if making), combine the remaining 200g caster sugar with 200ml water in a large pan. Bring to the boil, stirring until the sugar has dissolved. Add the thinly sliced limes in a single layer and simmer gently for about 15 mins, turning halfway through, until slightly translucent. Remove and place on a wire rack to cool.Step 8
To serve, cut into 12 bars, decorate with candied lime slices and zest, if using, and dust with icing sugar. The bars will keep covered and chilled for up to 3 days.