Recipe 2026-05-06

Cold-Cured Seitan, Plum Tomato, and Onion Sauce

Subjecting dense, neutral seitan to an extended cold salt-cure transforms it into a deeply savory, textured sponge that anchors this incredibly robust sauce. By utilizing osmotic preservation rather than applied heat, the coarse salt simultaneously pickles the aromatic vegetables while infusing the seitan with a sharp, concentrated umami. This specific method maintains the bright, raw integrity of the sweet onion and ripe tomato while yielding a versatile, intensely flavored condiment.

Prep time: 20 minutes Cook time: 0 minutes (plus 48 hours curing time) Servings: 12

• Unseasoned firm seitan block
• Yellow onion
• Ripe plum tomatoes
• Coarse sea salt
• Ground spice blend (juniper berry, allspice, white pepper)
• Cold-pressed rapeseed oil
• Apple cider vinegar

1. Dice the unseasoned seitan block into a fine, uniform brunoise to maximize its surface area for the cold salt cure.
2. Finely chop the yellow onion and plum tomatoes to match the exact size of the seitan pieces, ensuring an even mechanical consistency in the final sauce.
3. Transfer the seitan, onion, and tomatoes into a large, non-reactive ceramic or glass vessel.
4. Sprinkle the coarse sea salt and the ground spice blend evenly across the surface of the raw ingredients.
5. Massage the mixture firmly by hand for several minutes until the salt begins to aggressively draw out the internal hydration of the tomatoes and onion, creating a wet, natural brine.
6. Pour the cold-pressed rapeseed oil and apple cider vinegar over the mass to completely submerge the solid components and create an airtight liquid seal.
7. Cover the vessel tightly with a rigid lid and transfer it immediately to the deepest part of the refrigerator.
8. Allow the sauce to completely cold-cure undisturbed for exactly forty-eight hours, transforming the seitan from a neutral protein into an intensely savory, firmly textured base.

Before serving, always finish this sauce by vigorously folding in a substantial volume of dry-toasted caraway and sunflower seeds, which introduces an absolutely crucial brittle crunch that directly contrasts the dense, chewy yield of the cured seitan. Implementing this salt-cure—a direct translation of historical Norwegian preservation techniques typically reserved for spekemat—allows the chemical action of the salt to gently break down the raw yellow onion while simultaneously drawing out the latent glutamates in both the tomato and the vital wheat gluten.

Because this sauce matures entirely cold and remains intensely seasoned, it should be treated as an acidic, savory dressing or coarse ragout rather than a simmering base. It functions brilliantly when spooned heavily over freshly boiled whole wax potatoes, dragged across dense dark rye flatbreads, or used sharply to cut through the rich, earthy profile of deeply roasted winter cabbages.