In a mixing bowl, combine the flour and salt. Make a well in the center and add the Papondu.
Add the oil, milk, and water. Whisk with a whisk.
Add the sugar, vanilla sugar, yeast, and rum (if using).
Whisk again until the batter is smooth. If it isn't, add some water.
Let the dough rest in the refrigerator for 30 minutes.
Pour the batter into the pre-oiled waffle iron molds.
Cook for about 3 minutes.
Sprinkle the waffles with powdered sugar, jam, or maple syrup, and serve with seasonal fruit.