Tamagodon (玉子丼, simmered egg over rice)

Tamagodon is the plainest donburi, and that is why it teaches so well. No meat, no trick, no grand gesture. Just onion simmered in seasoned dashi, egg barely set, and rice waiting underneath to catch it all.

The one detail that decides the dish is the egg. Beat it lightly, pour it in unevenly, and stop cooking while the surface still looks soft. The egg will finish in the covered pan and on the hot rice. Cook it until it looks done in the pan and it will arrive at the bowl tired, which is a sad fate for something so inexpensive.

This is weeknight washoku by method, not menu: simmering, seasoning, rice, restraint. Use a clear dashi if you can. Konbu and katsuobushi give the bowl its quiet depth, and the soy and sugar only shape it. Nothing hidden. If you're cooking meatless, make the dashi from konbu and dried shiitake, the way temple kitchens do. That is honmono too.

Serve it in a deep donburi bowl, not piled high but settled gently over the rice. A little mitsuba or scallion on top gives green fragrance and a clean edge. Leave it room. Even a humble bowl deserves its breathing space.