Nepalese tomato-sesame timur achar for momo

A tomato achar for momo

In Kathmandu food writing, momo ko achar is a tomato-based accompaniment served with momos. One contemporary published recipe roasts tomatoes and garlic, toasts sesame and spices, then blends them into a thick dip. Its formula includes timur, which the publisher identifies as Nepali Sichuan pepper. This version follows that measured recipe; other accounts describe different ratios and additions, so it should not stand in for every Nepali household or shop's achar.

The source combines ripe tomato with half a cup of sesame for eight servings, then seasons the mixture with dried red chillies, garlic, ginger, timur and cumin. It also uses lemon juice and mustard oil. The ingredients suggest a tangy tomato base with toasted, nutty sesame, chilli heat and timur's tingling aromatic quality; that flavor description follows the source's ingredient list and sensory notes rather than asserting one canonical taste.

Achar, jhol and the history that remains open

A 2018 Kathmandu food article distinguishes momo ko achar from jhol achar, a thinner, sour sauce, and from the more recent chilli-forward C momo sauce. It describes tomato as the base for these different accompaniments and fried sesame and soybean as contributors to momo ko achar's nutty character. A 2025 Nepali Times report likewise records sesame-and-soybean jhol as one momo-cha accompaniment and tomato achar as another sauce served in Kathmandu eateries. These are accounts of modern practice, not evidence that this exact formula is old or was invented in one place.

The dumpling's own history is also debated. Smithsonian reports that momo's precise origin is unknown and discusses trade and Newar connections as accounts rather than a settled date. That context cannot date the condiment. The sources consulted do not establish when tomato-sesame momo achar first appeared, so this recipe's historical period remains unknown.

Toast carefully and serve fresh

The source's method builds flavor in stages: roast the tomatoes and garlic until blistered and softened, toast the sesame until pale gold, then briefly toast the chillies, cumin and timur. It warns that burnt sesame makes the achar bitter. Grinding the sesame before adding the other toasted spices gives the dip its body; blending with the tomato and aromatics and adding water as needed sets the final texture. The source finishes with mustard oil heated until smoking, cooled briefly, then mixed into the sauce. No numeric heating temperature is supplied.

The publisher says the sauce is best within three days when refrigerated. That is its own recipe note, not a validated shelf-life study. This fresh tomato preparation has no preservation claim. FDA's general guidance is to refrigerate perishable foods promptly, keep a refrigerator at or below 40°F (4°C), and not leave perishables at room temperature for more than two hours, or one hour above 90°F (32°C). Sesame is a major food allergen and should be disclosed to diners.

Three documented formulas, kept apart

The sources do not agree on one formula, so the measured batch above is one of several. The UK Nepal Friendship Society home-cookery booklet gives Golbeedaa Achar, a spiced tomato pickle that the booklet describes as smooth and sauce-like. It uses about eight to ten cherry tomatoes, half to three-quarters of a large brown onion, 2 cm of ginger, three or four garlic cloves, fresh chilli, coriander, fenugreek with optional thyme seed, lemon, two tablespoons of oil, white sesame, turmeric and salt. The cook blends the tomato, onion and spices into a puree, fries the fenugreek in hot oil, adds the puree with water, chilli, turmeric and salt, reduces it while stirring, and finishes with lemon. Several amounts are given as to taste or not stated.

A recipe archived on iNepal, credited to Tulsi Regmi and titled MOMO Achar (Sesame-Tomato Achar for MOMO), uses a charred method. It roasts two large tomatoes for about 30 minutes or until charred, toasts and grinds one cup of sesame with cumin and mustard seed, and blends the tomato with the ground seed, a cup of cilantro, five fresh red chillies, garlic, ginger, timur, asafoetida, lime juice and zest, and salt. Water may thin it. The page gives no yield, and the archived text has transcription errors, including lime zest printed as lime jest.

The Nepali Taste home batch, by Ritu G, serves six and starts from about 500 g of medium tomatoes with a quarter cup of white sesame, two dried red chillies, four garlic cloves, a tablespoon of ginger and two tablespoons of mustard oil. The tomatoes are charred over flame, three to four minutes each, or about ten minutes under a broiler. The sesame is toasted for two to three minutes. The mustard oil is heated until it smokes, a pinch of fenugreek is sizzled briefly, and the oil is cooled to lukewarm before the sauce is ground coarsely, mixed with lemon juice and rested for at least fifteen minutes.

These are separate formulas and this record does not merge them. The three share a serving role and a tomato-and-sesame base, but they differ in how the tomato is cooked, whether it is fried or charred, and whether mustard oil or no oil is used. A cook who wants one of them should follow that source's batch rather than mix the lists.

Where the sauce sits with momos

The UK Nepal Friendship Society booklet presents tomato achar as a classic accompaniment to steamed momos. It also pairs the sauce with dal-bhat-tarkari and rice dishes. The contributor, Deepak Tamrakar, describes learning the tomato achar at home in his teens and serving it with momos and dal-bhat-tarkari. The booklet uses the sauce to set Nepali momo accompaniment apart from the Chinese dumpling accompaniments it compares it with.

Those are one contributor's family memory and one booklet's framing. They are not evidence of where the sauce began. No dated archive, cookbook chronology or map of regional variants was found in the inspected material, and this record does not assign an origin to the momo achar or to the dumpling it accompanies.

The archived iNepal recipe is direct on use: serve with steaming momos. The Asian Foods Daily recipe, by Asha, presents the sauce as a dipping sauce for four to six people and makes about one cup.

Storage claims in the sources

Two home sources give a refrigerator period. Ritu G says the achar keeps for up to one week refrigerated in a clean glass jar. The Asian Foods Daily recipe says it keeps refrigerated for five days. Neither source describes a validated test, a cooling step or a room-temperature shelf life, and neither gives a water activity or pH.

This record therefore does not set a storage limit. The sauce is a fresh, oil-finished, sesame-and-tomato dip, and the sources treat it as a refrigerated product. Sesame is also a food allergen that must be declared, which the FDA guidance linked in the sources covers. Treat the periods above as the home authors' own claims and keep the batch cold.