Cold sauces & condiments
Seeni Sambol
සීනි සම්බෝල · A Sri Lankan sweet-savory condiment built on slowly oil-braised onions cooked down with warm spices, tamarind, chili and dried fish until jam-like. Despite 'seeni' meaning sugar, the perceived sweetness is primarily the result of long onion caramelization, with only a small amount of added sugar used to balance acid and heat. It functions as a reusable flavor base rather than a finished plated dish.
The formula
≈8:1 sliced onion:oil by volume; sugar ≈1:40 to onion (sweetness comes from caramelization, not the sugar)
Prior pass ratio of 4:1 onion:sugar is NOT supported by sources. Source 4 uses 5 large onions (≈5 cups sliced) with only 2 tsp sugar — roughly 40:1 onion to sugar. Source 1 explicitly states sweetness comes from naturally cooked onions, not added sugar. Maltose/brown sugar is used in larger quantity only in some commercial or hotel-style versions.
Identity
- Sri Lankan foundational condiment
- Slow oil-braised, not sautéed
- Sweet-spicy-sour-savory flavor matrix
- Caramelized onion base with tamarind tang
- Reusable table condiment and sandwich/hopper filling
- Linguistic root: 'seeni' = sweet/sugar; 'sambol' = sauce/condiment
Ingredients
| Base | red onions, thinly sliced | ≈5 large onions / 4–5 cups sliced; the structural and flavor foundation |
| Fat | coconut oil or vegetable oil | ≈4–6 tbsp per 5 onions (source 4); coconut oil preferred for Sri Lankan profile (source 2) |
| Acid | tamarind paste (with optional lime) | ≈1 tsp paste per batch; provides the sour counterpoint to sweet and savory |
| Aromatics | curry leaves, rampe (pandan), lemongrass, ginger, garlic | Source 4 includes rampe, lemongrass, ginger and garlic alongside curry leaves |
| Aromatics | green cardamom, cloves, Ceylon cinnamon | Warming-spice trio; source 2 lists green cardamom, cloves, cinnamon; source 4 uses cinnamon stick + 3–4 cloves |
| Sweetener | brown sugar (or maltose) | ≈1–2 tsp only — used to round out tamarind; most sweetness comes from onion caramelization (source 1) |
| Seasoning | dried chili flakes or fresh chili | Heat level is moderate; adjust to taste |
| Flavor | Maldive fish (umbalakada) | ≈¼ cup crumbled (source 4); signature savory funk. Diaspora Co. swaps in oil-packed anchovies; can be omitted for vegetarian versions |
Method
- 1Thinly slice red onions uniformly so they braise evenly and release moisture for natural caramelization.Uniform thin slices break down at the same rate, allowing the long slow cook to drive Maillard browning without burning the thinner pieces.
- 2Heat oil over medium heat and bloom curry leaves, rampe, lemongrass, ginger, garlic, cinnamon, cloves and cardamom until fragrant.Cold-oil blooming extracts fat-soluble aromatics from the spices and leaves without scorching them, layering the base flavor.
- 3Add the sliced onions with a pinch of salt and stir to coat; reduce heat to low and cook uncovered, stirring often.Low, patient heat drives off water and converts onion sugars into the deep brown, jammy color and flavor that defines seeni sambol — sweetness comes from this transformation, not from sugar.
- 4After ~20–30 minutes when onions turn mahogany and jam-like, stir in tamarind paste, sugar, chili flakes and crumbled Maldive fish; cook 5–10 minutes more.Acid and seasoning are added late so they brighten rather than dissipate, and the fish warms through without becoming harsh.
- 5Cook to a thick, glossy, chutney-like consistency where no free oil or liquid pools at the edges.The final texture should hold its shape on a spoon — under-reduction gives a watery sambol; proper reduction gives the characteristic chewy relish.
- 6Cool fully, then store refrigerated in a clean jar.Cooling in a sealed jar stabilizes flavor and extends shelf life; flavors continue to meld overnight.
Techniques that matter
Low-and-slow oil braise
Coaxes out natural sugars from onions for deep caramelization without scorching — the defining technique of seeni sambol.
Late-stage acid and seasoning add
Tamarind, chili and Maldive fish are introduced after browning so their bright and pungent notes survive the long cook.
Dry-roasting of Maldive fish
Traditionally Maldive fish is dry-toasted before crumbling to deepen its umami before it is folded into the relish.
Variations & derivatives
Anchovy-substitute versionDiaspora Co. (modern international)
Uses oil-packed anchovies instead of Maldive fish for similar salinity and funk.
Hotel/restaurant-style sweeter versionSri Lankan hotel kitchens
Uses noticeably more sugar or maltose for a glossier, sweeter profile marketed to tourists.
Vegetarian versionDomestic Sri Lankan homes
Omits Maldive fish; relies on extra tamarind and chili for savoriness.
Used in these dishes
Substitutions
- Maldive fish (umbalakada) → Oil-packed anchovies — Diaspora Co.'s documented substitute; provides comparable salinity and umami.
- Maldive fish → Dried shrimp powder — Adds savoriness without fish texture; less traditional but acceptable for vegetarians-leaning versions.
- Vegetable oil → Virgin coconut oil — More authentic Sri Lankan aroma; source 2 specifies coconut oil.
- Tamarind paste → Lime juice + a touch of vinegar — Source 2 uses both tamarind AND lime; pure lime alone is brighter and less rounded.
- Brown sugar → Coconut sugar or palm jaggery — Closer to traditional Sri Lankan sweetness profile.
- Red onions → Shallots — Shallots caramelize faster and taste sweeter/milder; works but shifts flavor away from classic seeni sambol.changes result
Troubleshooting
Relish is watery and pale, not jammy
Cooked too briefly or heat too high — water hasn't fully evaporated and Maillard browning never developed. → Continue uncovered on low heat, stirring often, until oil just begins to separate at the edges and color deepens to mahogany.
Bitter or acrid flavor
Onions or spices scorched because heat was too aggressive during the long braise. → Start over with lower heat; bloom spices only until fragrant and keep the pan on the gentlest simmer.
Cloyingly sweet
Added too much sugar relative to tamarind and chili; or used a sweet onion variety. → Rebalance with more tamarind and chili flakes; finish with a squeeze of lime to lift the sweetness.
Flat, one-dimensional savoriness
Skipped Maldive fish or didn't toast it before adding. → Add crumbled Maldive fish (or anchovies) late in the cook; alternatively boost with a pinch of salt and a dash of lime to mimic the funk.