Step 1:
Boil water and cook the sweet potatoes with the skin on for 40 to 50 minutes.
Step 2:
Rinse them under cold water and peel them.
Step 3:
Heat oven to 180°C (350°F)
Step 4:
Reduce them to a purée in a bowl and add the butter. Mix well.
Step 5:
Add sugar, milk, eggs, nutmeg, cinnamon and vanilla
Step 6:
Beat with a mixer until the batter is smooth. Then pour the mix over the shortcrust pastry.
Step 7:
Bake for 1 hour
Let cool before serving so that the contents solidify
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