Heat the milk in the microwave with a bit of orange peel and a cinnamon stick until it is warm.
Add the yeast, whether dry or fresh, and let it activate.
Beat four eggs until well combined.
Combine the pumpkin, beaten eggs, and milk in a large bowl. Mix everything together until well incorporated.
Add the flour and sugar, and mix until you have a smooth dough.
Grate the remaining orange peel and add it to the dough, along with the orange juice.
Add a splash of Port wine or aguardente (optional).
If the dough is too liquid, add a little more flour. The ideal consistency should be thick, not runny.
Cover the bowl with the pumpkin dough with plastic wrap or a cloth, and place it in a warm spot. Let the dough rest for at least 4 hours or overnight, until it doubles in volume.