Gyeran Mari (Korean Rolled Omelette)

Ingredients

• 4 large eggs
• 1/2 tbsp neutral-tasting oil
• Small pinch of sugar
• 1 tbsp sliced green onion (optional)
• 1 tbsp finely chopped carrot (optional)
• 1 tbsp finely chopped yellow onion (optional)
• Generous pinch of kosher salt