Jam Pan (ジャムパン, jam-filled sweet bun)

Jam looks harmless until it meets a hot oven. Then it remembers it's mostly fruit, sugar, and impatience. Jam pan asks for a soft milk dough and a filling sealed neatly enough that the bun bakes clean, with the sweetness waiting inside rather than escaping onto the tray.

This is kashi-pan, sweet bread, not dessert dressed as bread. The dough should be tender but not rich to the point of heaviness, because the jam needs a quiet room around it. Apricot is the old and excellent choice, tart enough to keep the bun awake. Strawberry is common now and very good if it tastes of fruit first and sugar second.

The detail that decides it is thickness. Use a firm jam, or cook a loose one briefly until it mounds on a spoon. A watery filling pushes through the dough and weeps no matter how piously you pinch the seam, and piety is not a baking technique. Cool the filling, seal the dough with dry edges, and set the seam underneath. That's the whole secret.

We eat jam pan as one of the everyday sweet breads of Japan, tucked into a school bag, a picnic basket, or a quiet afternoon with tea. It isn't difficult. It is only unfamiliar in its restraint: soft bread, honest fruit, nothing hidden.