In a pan heat 3/4 cup sugar on med-heat stirring constantly until caramelized.
Move the pan so the syrup will stick to one side of pan. Let cool.
Preheat oven to 250
Mix in a bowl of 10 egg yolks, evaporated milk, condensed milk, lime zest. Mix together, then strain all ingredients and pour into a loaf pan, add caramel sugar.
Put loaf pan in a rectangular cake pan, add water in the bottom til it reaches 1/2 in on the side of cake pan. Bake for 1 hour then cool before eating.