For the caramel, put the sugar and 50ml/2fl oz of water in a heavy based-pan. Heat gently until the sugar has dissolved, then bring to the boil. Boil for a few minutes, or until the syrup has ...
Bake the tarts in the oven for about 25 minutes - you may need to turn the temperature down to 180C/350F/Gas 4 for the final 10 minutes. You are looking for a very slight dome on the custard ...