01 - Rinse Japanese rice under cold water until water runs clear. Combine rice and water in rice cooker or pot. Cook according to rice cooker instructions, or bring to boil, cover, and simmer on low heat for 15 minutes. Let rest 10 minutes before serving.
02 - Combine rice vinegar, sugar, and salt in small bowl. Add cucumber and carrots, toss well. Let marinate at least 15 minutes.
03 - Pat fish fillets dry and brush with soy sauce and mirin. Heat oil in nonstick skillet over medium heat. Grill fish skin-side down for 3-4 minutes per side until cooked through and golden. Set aside.
04 - Beat eggs with soy sauce. Cook scrambled eggs or thin omelet in small nonstick pan, then slice into strips.
05 - Place portion of rice in each bento box, sprinkling with sesame seeds and nori strips. Arrange grilled fish, pickled vegetables, egg, avocado slices, steamed edamame, and apple on the side.
06 - Serve immediately, or let cool, cover, and refrigerate for portable breakfast.