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Tendon (天丼, tempura over rice)

Tendon (天丼, tempura over rice)

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Tendon asks for one piece of nerve: cold batter into hot oil, then sauce at the last moment. Do that, and the shrimp and vegetables sit crisp over rice that drinks the tare.

Main Dishes
Japanese
Comfort Food
Special Occasion
Date Night
30 min
Active Time
35 min cook1 hr 5 min total
Yield2 servings

Tendon looks like two hard dishes stacked on each other: tempura, then rice. It isn't. What decides it is not the number of pieces in the bowl, but the condition of the crust when it meets the sauce. Crisp first, glazed last. The rice will do the rest.

The sauce is tare, a dark sweet-savory glaze built from dashi, soy sauce, mirin, and a little sugar. It should taste too strong to drink, because it has two jobs: season the tempura quickly and sink into the rice below. If you drown the bowl, the crust gives up. If you brush or dip each piece lightly, you get the pleasure we want here, lacy edges above and seasoned rice underneath.

Use glistening fresh shrimp and vegetables in their 旬 (shun), at their prime. Kabocha in autumn, lotus root in winter, asparagus in spring, eggplant or shishito in summer. The batter is only there to protect what is good already, not to disguise it. Nothing hidden.

This is a donburi, a bowl meal, and it belongs to the plain good sense of Japanese cooking: rice, a little sauce, one careful method on top. Keep the batter cold, the oil steady, and the sauce restrained. Leave it room in the bowl. A crowded tendon is just impatience with chopsticks.

Tendon belongs to Edo, present-day Tokyo, where tempura grew from street-stall frying into a city food built around seafood, sesame oil, and quick service. By the late Edo period and early Meiji era, tempura shops were setting fried shrimp and fish on donburi rice and glazing them with a tentsuyu-derived sauce, turning a snack into a full meal. The darker, sweeter tare is especially tied to the Edo and Tokyo style, where strong soy sauce and urban tempura culture developed side by side.

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Ingredients

cold water

Quantity

2 1/2 cups

konbu (dried kelp)

Quantity

1 piece (about 5g)

katsuobushi (bonito flakes)

Quantity

12g

Japanese short-grain rice

Quantity

1 1/2 rice-cooker cups

rinsed and cooked to yield about 3 cups

dashi

Quantity

3/4 cup

koikuchi shoyu (dark soy sauce)

Quantity

1/4 cup

mirin

Quantity

1/4 cup

sugar

Quantity

2 tablespoons

large shrimp

Quantity

4

peeled with tails left on and deveined

seasonal vegetable pieces

Quantity

8 small pieces

thinly sliced or trimmed for quick frying

cake flour or low-protein flour

Quantity

3/4 cup

kept cold

cake flour or low-protein flour, for dusting

Quantity

1/4 cup

egg yolk

Quantity

1 large

ice-cold water

Quantity

3/4 cup

neutral frying oil

Quantity

6 cups, or enough for 2 inches in the pot

toasted sesame oil (optional)

Quantity

1 tablespoon

for Edo-style fragrance

Equipment Needed

  • Tempura nabe, or a heavy Dutch oven
  • Frying thermometer
  • Long cooking chopsticks, or tongs
  • Abura-kiri draining rack, or a wire rack set over a tray
  • Deep donburi bowls

Instructions

  1. 1

    Make the dashi

    Wipe the konbu with a damp cloth, but don't wash it. Put it in the cold water and bring it up slowly over low heat. Pull the konbu just before the water boils, when small bubbles climb the sides of the pot. Add the katsuobushi all at once, take the pot off the heat, and leave it alone for two or three minutes. Strain through a cloth or fine sieve and let it drip naturally.

    Boiled konbu turns the stock bitter and slick, and squeezed bonito flakes press out oily strength. You're guarding clarity, even though this dashi will become a dark sauce.
  2. 2

    Cook the rice

    Rinse the short-grain rice until the water runs almost clear, then cook it so it finishes before you fry. Hot rice catches the tare and stays tender under the tempura. Cold rice makes the bowl feel divided, as if the top and bottom were introduced too late.

  3. 3

    Simmer the tare

    Combine 3/4 cup dashi, shoyu, mirin, and sugar in a small pan. Bring to a gentle simmer and cook for 5 to 7 minutes, until glossy and lightly thickened. It should taste a little too salty and sweet on its own. That is correct. Rice and crust will soften it.

    The tare must cling without soaking. Thin sauce runs straight through the crust; thick sauce sits heavily on top. Aim for the shine of lacquer on a spoon.
  4. 4

    Prepare the toppings

    Pat the shrimp and vegetables very dry. Make two or three shallow cuts across the underside of each shrimp, then press it gently straight with your fingers. This keeps the shrimp from curling hard in the oil and helps it cook evenly. Slice dense vegetables thin, about 1/4 inch for kabocha or lotus root, so the crust and center finish together.

  5. 5

    Heat the oil

    Pour the oil into a tempura nabe or heavy pot, adding the toasted sesame oil if using. Heat to 170 to 180 C, or 340 to 355 F. A drop of batter should sink slightly, then rise with small lively bubbles. If it browns at once, the oil is too hot. If it lies there sulking, wait.

  6. 6

    Mix the batter

    Stir the egg yolk into the ice-cold water, then add the cold flour and mix with chopsticks only a few strokes. Leave lumps. Smooth batter is not a virtue here. The cold water slows gluten, and the loose mixing keeps the coating light instead of breadlike.

    Make the batter only when the oil is ready. Tempura batter waits badly, and it grows heavier while it stands.
  7. 7

    Fry the tempura

    Dust each piece lightly with flour, shake off the excess, dip into the batter, and lower it into the oil away from you. Fry vegetables first, then shrimp, working in small batches so the oil stays lively. Turn once, and lift each piece when the crust is pale gold and crisp, usually 1 to 2 minutes for shrimp and shishito, 2 to 3 minutes for kabocha, eggplant, shiitake, or lotus root. Drain on a rack, not on paper pressed tight against the crust.

    The dusting flour gives the batter something to hold. Crowding drops the oil temperature and makes the coating drink oil, which is the opposite of tempura.
  8. 8

    Assemble the bowls

    Divide the hot rice between two warm donburi bowls and spoon a little tare over the rice first. Quickly dip the top side of each tempura piece in the tare, or brush it lightly, then arrange two shrimp and several vegetables over each bowl with a little height. Serve at once, while the edges are still crisp and the bottom rice has begun to drink.

Chef Tips

  • Ask for shrimp that smell clean and sweet, with firm flesh and no sour edge. If the shrimp aren't good, make yasai tendon, vegetable tendon, with seasonal vegetables and konbu-shiitake dashi. That's honmono too, not a consolation prize.
  • Use real dashi for the tare. Powder gives salt and a flat bonito taste, while fresh dashi gives the sauce its clean backbone. In tendon the sauce is small, so every spoonful has to work.
  • Keep the batter bowl cold, and don't admire your frying too long. Tempura is best in the first minutes after it leaves the oil, before the crust relaxes.
  • Do not pour the tare over the whole bowl as if correcting a mistake. Brush or dip the pieces lightly, then season the rice beneath. The crust matters more than the count.

Advance Preparation

  • The dashi can be made up to 2 days ahead and kept refrigerated.
  • The tare can be simmered up to 5 days ahead. Warm it gently before using so it brushes cleanly over the tempura.
  • The shrimp and vegetables can be trimmed a few hours ahead, then kept covered and dry in the refrigerator. Pat them dry again before dusting.
  • Do not make the batter ahead, and do not fry the tempura ahead. That last-minute work is the dish.

Frequently Asked Questions

Nutrition Information

1 serving (about 540g)

Calories
930 calories
Total Fat
26 g
Saturated Fat
3 g
Trans Fat
0 g
Unsaturated Fat
23 g
Cholesterol
155 mg
Sodium
1850 mg
Total Carbohydrates
143 g
Dietary Fiber
5 g
Sugars
27 g
Protein
24 g

Note: Chef personas and recipes are created with AI assistance. Cook with care: follow safe food-handling practices, check doneness with a thermometer when needed, and adapt for allergies and your kitchen.

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