The hottest sprout in the Brassica family, and one of the boldest in the entire microgreen world. Native to the Himalaya and northern India, Brassica juncea is the species used to make the famous Dijon mustard (the seeds are crushed with vinegar and grape verjuice), and is also the foundation of Indian mustard cuisine — Punjabi sarson ka saag (mustard-leaf curry), roasted mustard seeds in tarka over dal, Bengali panch phoron spice blend (five whole spices, brown mustard among them).
At the sprout or microgreen stage, you get the concentrated effect: small green shoots with stems lightly tinged red, explosive mustard flavour, immediate heat that rises to the nose like wasabi sauce, followed by a fresh herbaceous note in the finish — thanks to the release of allyl isothiocyanate (the same molecule as in horseradish and wasabi). Botanically distinct from the other Brassicas.
Use: incorporate in small amounts (the heat is intense) into roast beef and ham sandwiches, on gourmet hot dogs, in cream cheese and lox bagels, on pizza just before serving, or as "living mustard" alongside charcuterie. To avoid for mild-flavour lovers; an absolute must-try for those who love heat.
- Soaking: not required (small seeds); optional 4-6 hours.
- Germination time: 2-3 days.
- Sprout harvest: 4-6 days after soaking begins.
- Microgreen harvest: 8-12 days after sowing.
- Yield: about 1 tsp of seeds produces a 20 × 20 cm tray of microgreens.
- Best uses: living mustard for charcuterie, bold sandwiches, dishes where you want heat.
