Cube the pumpkin and bake it until soft, at low temperature. Purée it with a fork and let it cool. Once it is cold, drain the pumpkin from the excess liquid: this passage is essential to ensure the dough has the right consistency.
Dilute the yeast in a little amount of lukewarm water and a tablespoon of sugar. Add it to the pumpkin, along with the eggs, the juice of the three oranges, two dashes of salt and, finally, the sieved flour. Knead until the dough is homogeneous and smooth. In case the pumpkin you chose lacked in color and wish a more vibrant result, add a couple of drops of yellow and red food coloring to the mix.
Let the dough rest and rise in a covered bowl for about two hours.
Heat the frying oil in a deep pan; spoon the dough in the hot oil and cook until it is golden. It should take two or three minutes. Drain and place on kitchen paper to absorb the excess oil.
At this stage, you can sprinkle the fritters whether with sugar or salt, depending on your fancy. They are better enjoyed warm.
If you would like to make fully sweet fritters, just add some raisins to the dough.