I never had this dish at a restaurant. I never stumbled upon it on a trip. It came to me the way a lot of my best recipes do these days — scrolling through a screen at some ungodly hour, and suddenly stopping dead.
I saw it on cabagges.world and I was immediately obsessed. Grated fresh tomatoes as a cold soup base, somen noodles chilled in ice water, a Japanese-inspired sauce with soy, mirin, dashi. It looked insane. It looked refreshing. It looked like exactly what a 35-degree afternoon demands.
I made it almost exactly as written — just a couple of tiny tweaks — and it delivered. Completely. Cold noodles are already my thing, but these are vegetarian and they somehow still hit every note I want: umami, acidity, freshness, that satisfying slurp. We are glowing and hydrated.
Cold Tomato Noodles – About the dish
Somen (素麺) are ultra-thin Japanese wheat noodles, typically eaten cold in summer — often served in ice water and dipped into a chilled tsuyu broth. They cook in about two minutes, which makes them the perfect hot-weather noodle. The tradition of eating cold somen in Japan is centuries old, and it’s one of those things that just makes complete sense the moment you try it on a sweltering day.
What makes this dish clever is using grated raw tomatoes as the soup base. When you grate a tomato on a box grater, the skin stays behind and the flesh collapses into a bright, watery, intensely flavoured pulp. It’s a technique used across the Mediterranean — hello Catalan pan con tomate — but here it gets a Japanese treatment: soy sauce, mirin, dashi powder, and lime. The result is something that feels both familiar and completely new.
No somen? Don’t stress — thin spaghetti, regular spaghetti, or soba all work well here. The point is cold noodles in a cold, punchy broth. The format is flexible, the flavour is not.
Cold Tomato Noodles – Recipe
Ingredients – Advice & key points
- Somen noodles: 100g per person. These thin, delicate wheat noodles are the star — they cook in 2 minutes and become silky when chilled. Find them at any Asian grocery store. No somen? Thin spaghetti (spaghettini), regular spaghetti, or soba noodles all make solid substitutes. Same technique applies: cook, drain, rinse with cold water, chill in ice.
- Ice: Non-negotiable. You need a bowl of ice water to shock the noodles after cooking and keep them cold until serving. This firms up the texture, and makes the dish what it is. Lots of ice.
- Tomatoes: 2 medium, ripe ones. The riper the better — you want maximum juice and sweetness when you grate them. Watery, flavourless tomatoes will make a watery, flavourless broth. Use the good ones.
- Cold water: Just 1/4 cup — it loosens the grated tomato into a pourable soup consistency. Add it after grating.
- Soy sauce: 2.5 tbsp. The umami backbone of the broth. Use a good quality regular soy sauce — light or all-purpose, not sweet kecap manis.
- Mirin: 2 tbsp. This sweet Japanese rice wine rounds out the saltiness and adds depth. It’s what makes the broth taste Japanese rather than just tomato-water-with-soy. Find it at any Asian grocery or well-stocked supermarket.
- Dashi powder: 1/2 tsp. This is your instant umami booster. Just a small amount adds that deep, savoury quality that makes the broth complex. Available at Asian grocery stores. If you can’t find it, a tiny pinch of MSG or a small splash of fish sauce will work, too.
- Lime juice: 1 tbsp, adjust to taste. The acidity that ties everything together and makes the broth bright. Start with 1 tbsp and add more after tasting.
- Basil: 6 leaves, chiffonade. A chiffonade means stacking the leaves, rolling them tightly into a cigar shape, then slicing crosswise into thin ribbons. It’s the right cut here — it distributes the basil evenly and looks elegant. Fresh only, please.
- Cherry tomatoes (optional topping): A few halved on top. Just for texture, colour, and extra freshness. Completely optional but highly recommended.
Recipe – Advice & key points
- Grate the tomatoes directly: Cut the tomatoes in half and grate them cut-side down on a box grater over a bowl. The flesh pulps into juice, the skin stays in your hand — just discard it. This is faster and less wasteful than peeling.
- Build the broth in the same bowl: Once the tomatoes are grated, add the soy sauce, mirin, dashi powder, cold water, and lime juice right into the same bowl and stir. Taste it — it should be savoury, slightly sweet, acidic, cold. Adjust lime if needed.
- Cook the noodles al dente: Somen cook fast — usually 3 minutes in boiling water. Don’t overcook or they’ll become mushy and fall apart in the broth. Follow the package timing and pull them at the right moment.
- Rinse aggressively with cold water: After draining, run cold water over the noodles until they are completely cool, then transfer to a bowl of ice water. This removes excess starch (which would make them clump and gluey), stops cooking, and chills them down.
- Keep everything cold: The broth should be cold, the noodles should be cold. This dish only works when it’s properly chilled — don’t serve it at room temperature.
- Serve in the right order: Ladle the tomato broth into the bowl first, then add the drained noodles. Top with basil chiffonade and cherry tomatoes. This way the noodles don’t absorb all the broth before it reaches the table.
That’s it. No heat, no stress, pure summer. Credit to cabagges.world for the original — this one’s basically theirs with a couple of small tweaks, and it’s one of the best things I’ve eaten this season.
Enjoy !
Cold Tomato Noodles
Description
Cold somen noodles in a chilled raw tomato broth with soy, mirin, dashi and lime. A vegetarian Japanese-inspired summer bowl that refreshes completely. Original recipe from cabagges.world.
Ingredients
Instructions
Grate the tomatoes
Grate two medium tomatoes directly into a bowl using a box grater. You'll end up with a juicy, pulpy tomato base.
Cook and chill the noodles
Cook somen noodles according to package directions. Drain, rinse under cold water, and add to a bowl of ice.
Make the tomato broth
To the same bowl with the grated tomatoes, add the cold water, soy sauce, mirin, dashi powder, and lime juice. Stir to combine. Taste and adjust lime juice if needed.
Chiffonade the basil
Stack the basil leaves, roll them tightly into a cigar shape, and thinly slice crosswise to create thin ribbons.
Assemble the bowl
Ladle the tomato broth into a serving bowl, then add the drained chilled somen noodles.
Top and serve
Top with the basil chiffonade and, if using, a few cherry tomatoes sliced in half. Serve immediately while cold.