In a small bowl, dissolve the sugar in the warm water. Sprinkle the yeast over the water and let it sit for 5-10 minutes, or until frothy.
In a large bowl, combine the flour and salt. (Add ground cumin if using for extra flavor.)
Make a well in the center of the flour mixture and pour in the yeast mixture and vegetable oil.
Mix until a dough forms. Turn the dough out onto a floured surface and knead for about 5-7 minutes, or until smooth and elastic.
Place the dough in a lightly oiled bowl, cover with a damp cloth, and let it rise in a warm place for about 1-2 hours, or until doubled in size.
Preheat your oven to 375°F (190°C). Line a baking sheet with parchment paper.
Punch down the risen dough and divide it into 8-10 equal pieces.
Shape each piece into a round or oval roll and place them on the prepared baking sheet.
Cover the rolls with a damp cloth and let them rise for another 30 minutes.
Brush the tops of the rolls with the beaten egg and sprinkle with nigella seeds or sesame seeds.
Bake in the preheated oven for 15-20 minutes, or until the rolls are golden brown.
Allow the Samoon to cool slightly before serving. They are best enjoyed fresh and warm.
Enjoy your meal!