Pumpkin flan

I love pumpkin so when fall on it way pumpkin flan is the dessert that I love to prepare and replace pumpkin pie for the Thanks giving dinner.
Ingredients:
Caramel sauce:
1/3 cup sugar
Custard:
3 eggs
1 egg yolk
1 cup solid pumpkin ( the one to make pumpkin pie)
1 cup skim or whole milk
1/2 cup sugar
1 tsp vanilla
1tsp ground Cinnamon
Glass baking dish 9x 6 or 6 4 oz ramekins
Baking pan 12x 13
Directions:
Preheat oven to 350 °
Spray cooking oil into baking glass. Set aside
To make caramel:
In a small sauce pan over low heat cook 1/3 cup sugar until golden brown. Quickly pour into baking glass. Don't worry if the caramel become hard. It will melt when bake.

whisk eggs and pumpkin until combine. Add Cinnamon and vanilla.

In another sauce pan over medium heat bring milk and 1/2 cup sugar until almost boil. Whisking slowly into the egg mixture then drain through the fine sieve. Pour the eggs milk mixture into the baking glass.

Place the baking glass onto the baking pan. Pour enough hot water until reach  half way of the baking glass. Bake in the preheat oven for 40 minutes. Let flan cool off and refrigerate until ready to serve.

The flavor will develop better if flan can be made a day ahead.