Spring Vegetables, Simply Elevated — Shio Koji Roasted Asparagus & Yellow Squash
Shio Koji Roasted Asparagus & Yellow Squash
What I love about shio koji is how little effort it asks of you — and how much more delicious it makes every ingredient.
日本語は下にあります。
This week I marinated asparagus and yellow squash with nothing but shio koji, then roasted them in the oven. The result was exactly why I fell in love with koji in the first place: deep umami, natural sweetness, and a beautiful golden color. No complicated marinade, no long ingredient list. Just let the koji do its thing.
As someone who teaches koji, what I want to share is this — it's a little different from simply "seasoning" your food.
The enzymes in shio koji — protease and amylase — break down the proteins in vegetables and convert starches into sugars. That's why vegetables roasted with shio koji taste sweeter and more complex than those seasoned with plain salt. The enzymes are doing the delicious work!
You're not just adding flavor. You're transforming the ingredient itself.
And the marinating time? Just 30 minutes, hands-off. Busy mamas, this recipe is for us. Start the marinade while the kids are doing homework, then let the oven toaster take care of the rest. That's all it takes to make your table so much richer.
Spring vegetables are at their most beautiful right now — in color, in flavor, in everything. Let's eat more of what's in season. With koji, vegetables become something even more extraordinary.
春野菜をシンプルに格上げ — 塩こうじのアスパラガス＆黄色スクワッシュのロースト
塩こうじの好きなところは、手間をかけさせないのに、ちゃんともっと素材を美味しくしてくれるところです。
今週はアスパラガスと黄色いスクワッシュを塩こうじだけでマリネしてオーブンで焼きました。結果は、私が麹にはまった理由そのもの。深いうまみ、自然な甘さ、きれいなきつね色。複雑なマリネ液も、長い材料リストも必要ありません。ただ麹に任せるだけ。
麹を教える立場からお話したいのは、これは「調味料で味付けをする」という話とは少し違います。 塩こうじに含まれるプロテアーゼやアミラーゼといった酵素が、野菜のたんぱく質を分解し、デンプンを糖に変えていきます。だから塩こうじで焼いた野菜は、塩だけで焼いたものより甘く、複雑な味になるんですね。酵素が美味しくしてくれます！
味をつけているのではなく、素材を変容させているんです。 しかも、マリネ時間はたったの30分。放っておくだけ。忙しいお母さんたち、これは私達のためのレシピです。子どもが宿題をしている間に仕込んで、あとはオーブントースターにお任せ。それだけで食卓がぐっと豊かになります。 今が旬の春野菜は、色も味も本当に美しい。季節のものを、もっとたくさん食べましょう。麹があれば、野菜はさらにおいしくなります。
Shio Koji Roasted Asparagus & Yellow Squash
A 3-ingredient spring side that lets shio koji's enzymes do all the work — bringing out natural sweetness and a gorgeous golden finish.
INGREDIENTS • 150 grams asparagus, tough ends snapped, lower stalks peeled • 100 grams yellow squash, cut into bite-size pieces • 1 tablespoons shio koji (塩糀)
STEPS
Prep the vegetables: Snap the tough ends off the asparagus and peel the lower third of each stalk with a peeler. Cut the yellow squash into similar-sized pieces so everything roasts evenly.
Marinate with shio koji: Combine the vegetables and 1 tablespoons shio koji (塩糀) in a bowl and toss well until every piece is coated. Let rest at room temperature for about 30 minutes. The enzymes in the koji will begin breaking down natural starches into sugars — this is where the sweetness comes from.
Roast: Arrange the vegetables in a single layer on a tray. Roast in an oven toaster (or oven at 230°C / 450°F) for about 5 minutes, until lightly caramelized and fragrant. Watch closely — shio koji's natural sugars brown quickly.
Serve: Transfer to a plate while hot. The asparagus should be bright and tender, the squash golden at the edges. No extra seasoning needed — shio koji has already done everything.
NOTES
Ratio to remember: 1 tablespoon shio koji per 250g of vegetables. Scale up freely — the ratio stays the same.
Koji instructor tip: Don't rinse off the shio koji before roasting. The koji particles caramelize on the surface and create that irresistible golden crust.
Make it a meal: Add a soft-boiled egg and a scoop of rice. Five minutes of active effort, done.