Boil water in a pot, cut vermicelli in half with kitchen scissors, cook according to package instructions, drain, and let cool. Slice cucumber diagonally and cut into thin strips.

Cut ham in half and slice into thin strips.

Crack the egg into a bowl, add the egg seasoning ingredients (sugar, salt, dashi powder), and mix well.

Heat salad oil in a frying pan over medium heat, pour the egg mixture, spread evenly, and cook until the surface dries. Flip the egg gently, cook for 20 seconds, and remove. Let cool, cut in half, and slice into thin strips.