Korean
Mix the warm rice with 1 tbsp of the sesame oil and 1/2 tsp of the salt and let it cool slightly.
Blanch the spinach for 30 seconds, rinse it in cold water, squeeze it dry and toss it with the remaining sesame oil and a pinch of salt.
Stir-fry the carrot in 1 tsp of the oil for 2 minutes, then briefly fry the ham strips in the same pan.
Beat the eggs with the remaining salt, cook them as a thin omelette in the remaining oil and cut it into long strips.
Lay a nori sheet shiny side down on a bamboo mat, spread 130 g of rice over it, leaving 3 cm free at the top, and lay a quarter of each filling across the middle.
Roll it up tightly with the mat and seal the edge with a few grains of rice.
Sprinkle the rolls with sesame seeds and cut each into 10 slices with a wet knife.