* in a non stick mould ir pan heat sugar till it caramelize to syrup. Take care cause it may burn quickly.
*leave to cool then place in another wider pan filled with water(water bath).
*beat eggs with vanilla and zest till frothy.add milk.
* add the Nestle can and water then mix all very well.
* pour over caramel.
* bake in a medium heated oven for 30-40 minutes or when dried in the middle.
* cool in the fridge 2-3 hours.
* turn upside down and cover with caramel.