Butter a microwavable basin. Pour in four tablespoons of lemon curd.
Beat together 100 grams soft butter, 100 grams caster sugar, 100 grams self raising flour, 1 tablespoon milk, two large eggs and the zest of one lemon.
Spoon over the curd. Microwave uncovered for three and a half to four minutes, until risen and cooked through.
Leave to stand for one minute.
Loosen edges with spatula and turn out onto a plate.