Japanese Sweet Rolled Omelet (Atsuyaki Tamago)

Ingredients

• 4 large eggs
• 4 Tbsp sweet dashi (recipe follows)
• 2 Tbsp neutral-flavored oil (vegetable, rice bran, canola, etc) (to cook the egg)
• 1 ¼ cup dashi (Japanese soup stock; click to learn more)
• ½ cup sugar
• 1 ½ tsp soy sauce
• 2 tsp kosher/sea salt (I use Diamond Crystal; use half for table salt)