Add 4 cups dashi and ½ teaspoon salt to a saucepan and heat until steam begins to rise from the surface.
4 cups dashi, ½ teaspoon salt
Separate 170 grams matsutake mushrooms, stems from the caps. Chop the stems and slice the caps into ⅛" thick pieces
170 grams matsutake mushrooms
Heat a nonstick frying pan with 1 tablespoon cultured unsalted butter and 1 tablespoon olive oil until hot. Add 1 tablespoon shallots and chopped matsutake stems. Cook until the butter browns slightly and the mushrooms take on a light golden color.
1 tablespoon cultured unsalted butter, 1 tablespoon olive oil, 1 tablespoon shallots
Add 140 grams Japanese short grain rice and stir for about a minute, coating each grain with the butter and oil.
140 grams Japanese short grain rice
Pour in ¼ cup sake and stir until it has evaporated. Add two ladles of dashi, stirring constantly until most of the liquid is absorbed. Continue adding dashi one ladle at a time, stirring constantly, until the rice reaches your preferred doneness (about 3 ½ cups of dashi for an al dente risotto).
¼ cup sake
While the risotto cooks, heat a second pan with 1 tablespoon olive oil. Fry the matsutake caps until browned, then season lightly with salt and pepper. Transfer to a plate.
1 tablespoon olive oil
Add 1 tablespoon cultured unsalted butter to the same pan, then add 2 tablespoons panko. Toast, stirring constantly, until golden brown. Transfer to a plate and set aside.
2 tablespoons panko, 1 tablespoon cultured unsalted butter
When the risotto is done, stir in 14 grams parmigiano reggiano and 1 tablespoon cultured unsalted butter until incorporated. Taste and adjust with salt if needed. Plate the risotto and top with the sautéed matsutake caps and toasted breadcrumbs.
14 grams parmigiano reggiano, 1 tablespoon cultured unsalted butter