Sesame tofu and nori rice bites

Method

1. Rinse the rice repeatedly in cold water until the water is mostly clear. Drain, combine with 330 ml water, and cook in a rice cooker on its white-rice setting, or bring to a boil in a covered saucepan, reduce to very low heat for 12 minutes, then rest off the heat for 10 minutes.
2. While the rice cooks, pat the pressed tofu dry (or simmer it whole for 3 minutes in salted water instead of pressing, see the tofu prep formula) and crumble it into pieces about the size of peas. Whisk the soy sauce, rice vinegar, maple syrup, sesame oil, ginger, and garlic.
3. Heat the neutral oil in a 28 cm skillet over medium-high heat. Spread in the tofu and cook for 7 to 10 minutes, turning only after the underside browns. Work in two batches if the tofu cannot sit in one layer.
4. Add the soy mixture and cook for 1 to 2 minutes, stirring, until the tofu is glossy but dry and no liquid pools in the skillet. Stir in the sesame seeds, transfer to a clean shallow plate, and refrigerate once the heavy steam stops.
5. Stir the 30 ml rice vinegar, sugar, and salt until dissolved. Fold through the hot cooked rice with a cutting motion so the grains stay distinct. Spread the rice in a wide shallow bowl for 5 minutes, only until warm enough to handle.
6. Divide the rice into 12 portions of about 50 g. With clean damp hands or plastic wrap, flatten one portion, place about 25 g chilled tofu in the centre, close the rice around it, and press into a compact rectangle. Repeat without crushing the grains into paste.
7. Arrange the bites in one layer in a shallow clean container. Refrigerate uncovered for 10 minutes, then cover. Complete all cooling and refrigeration within 1 hour of the rice finishing its cook cycle.
8. Wrap each chilled bite with a nori band shortly before eating. For a packed meal, carry the nori dry in a separate packet and wrap at lunchtime for the crispest texture. If structural support matters more than crispness, wrap before packing and expect soft nori.

Storage and transport

• Refrigerate tofu filling and shaped rice bites at 4°C or colder. Eat within 24 hours. Properly chilled bites may be eaten cold.
• If reheating, remove nori and heat only once until the centre is steaming hot. Serve immediately. Do not partially warm and refrigerate again.
• Freezing assembled bites is not recommended because thawed seasoned rice becomes firm and nori turns leathery. Cooked glazed tofu alone may be frozen airtight for up to 1 month, thawed in the refrigerator, and used with a fresh batch of rice.
• Pack bites directly from the refrigerator in an insulated bag with two frozen cold sources, one above and one below. Carry dry nori separately. The bites cannot travel safely without cold sources.
• The maximum cumulative time out of refrigeration is 2 hours, or 1 hour above 32°C. Discard bites that exceed that limit because cooked rice and tofu may be unsafe without visible spoilage.

Notes

• Allergens: soy and sesame. Standard soy sauce usually contains wheat. Use certified gluten-free tamari and verify the vinegar and nori for a gluten-free version.
• Pressing and browning the tofu before glazing keeps the filling concentrated and prevents wet rice. A short simmer in salted water works even faster than pressing and seasons the tofu at the same time; see the tofu prep formula.
• Do not wait for the rice to reach room temperature before shaping. Warm rice holds together best, and the one-hour cooling clock starts when cooking finishes.
• Use a separate board and dry scissors for nori so it stays clean and crisp.

Sources consulted

• Boston University Sargent Choice Nutrition Center: Tofu Onigiri
• GOV.UK: Student guide to food safety and hygiene
• USDA WIC Works: What Do I Do With Tofu?
• USDA FSIS: Keeping Bag Lunches Safe
• FDA: Food Allergies, What You Need to Know