Mix 1 egg with a pinch of salt and some pepper.
Slice the onion and shred the chicken breast into small pieces.
Sauce: Mix 1 tablespoon each of soy sauce, mirin, allulose (or stevia), oyster sauce, and 2 tablespoons of water.
Prepare scrambled eggs and place them on top of the rice. Sauté the chicken breast.
When the chicken absorbs the oil, add the onions and keep frying. Once the onions are half cooked, pour in the sauce from earlier and simmer on low heat.
Place step 5 on top of the rice, then garnish with seaweed flakes, mayonnaise, and sesame seeds.