
Tamatar Rasam
A light, tangy South Indian soup infused with tomatoes, warm spices, and a fragrant spiced oil tempering.
boiling spice
0.3 gAdded to the saucepan with the tomatoes (step 2)seasoning spice
2.6 gStirred into the broth off the heat (step 3)tempering spices
8 gSizzled in the hot oil (step 4)Everything else
Method
- Warm 14 g of the vegetable oil in a frying pan over medium heat, then fry 150 g onion for 5 to 7 minutes until pale golden.
- Transfer the softened onions to a large pot along with 500 g tomato, the boiling spice, and 750 g water. Bring to a boil and let it cook vigorously for 10 minutes.
- Take the pot off the heat and stir in 4.2 g granulated sugar, the seasoning spice, and salt to taste.
- Warm the remaining 13 g vegetable oil in a small pan over medium heat. Add the tempering spices, 1.1 g urad dal, and 2 g curry leaf, frying for about 2 minutes until deep brown and fragrant.
- Pour the sizzling contents of the small pan straight into the tomato broth and simmer gently for 5 minutes. Scatter 100 g coriander leaf over the top before serving.
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Vegetable oil

Peanut oilUse 1:1 by weight. Handles high-heat frying identically and introduces a very subtle, pleasant nuttiness.
GheeUse 1:1 by weight. Yields a much richer, authentic aroma and a glossy, heavier mouthfeel.
Mustard oilUse 1:1 by weight. Heat until smoking, then cool slightly before cooking to temper its intensely pungent, sharp mustard kick.

Onion


Tomato

Tomato puréeUse 40% to 50% of the fresh tomato weight mixed with a splash of water. Imparts a deeper red colour, thicker sauce, and slightly sweeter cooked flavour.
Plain yogurtUse 60% of the weight, whisked smooth and added on low heat. Provides rich body and sourness, though the gravy becomes paler and creamier.

Ground turmeric

Ground gingerUse 50% of the weight. Mimics turmeric's warm, earthy, rhizome background, but provides none of the golden-yellow colour.
SaffronSteep a tiny pinch (0.1 g per 2 g turmeric) in 2 tbsp warm water; use to match the rich golden hue. Contributes an aristocratic, honeyed floral flavour rather than earthy bitterness.

Granulated sugar

JaggeryUse equal weight; grate or shave finely so it dissolves rapidly, giving a warm, caramel-like sweetness and slightly darker sauce.

Chilli powder

Red chilli powderUse 100% of the weight. Provides direct, sharp heat and red colour in equal measure.
Kashmiri chilli powderUse 150% to 200% of the weight if matching colour, but add a pinch of black pepper or hot chilli if you need equivalent fiery heat.
Cayenne pepperUse 75% to 100% of the weight. Offers a sharp, clean heat with slightly less earthy depth and less crimson colour.

Dried red chilli

Dried kashmiri chilliUse equal weight whole. Fry in hot oil or ghee as tempered spice; gives a richer red colour with slightly milder heat.
Red chilli powderUse 50% to 70% of the weight. Stir into the oil with ground spices; distributes heat evenly throughout the dish without whole chilli skins.

Mustard seed

Black mustard seedUse the same weight. The seeds are smaller and hotter; fry in hot oil until they pop, about 20–30 seconds, and reduce the heat if they darken too fast. The dish will be a little sharper.
Yellow mustard seedsUse the same weight. They are milder and larger; fry a few seconds longer until they pop. The finished dish will have less pungency.
Ground mustard seedUse 70% of the weight of whole seed, added with the other ground spices rather than fried whole. You lose the popping texture and the heat comes through more evenly.

Cumin seed

Ground cuminUse 70% of the weight; add with ground spices or sauce bases rather than hot oil tempering, where it scorches quickly and turns bitter.
Black cumin seedsUse equal weight for oil tempering. Delivers an earthy profile with an additional musky, smoky, and slightly bitter edge.
Fennel seedUse 60% of the weight for tempering; offers comparable warm aroma, but leans sweet and liquorice-like rather than savoury and earthy.

Urad dal

Whole black gramUse equal weight. Needs longer soaking and cooking; the dark skins impart an earthy flavour and greyish-black hue unless thoroughly rubbed off.
Chana dalUse equal weight when tempering (tadka). Provides a comparable nutty, crunchy texture in hot oil, though grains are slightly larger.
Split mung beansUse equal weight for batters or dals. Ferments and cooks faster, producing a lighter, less sticky, and less viscous consistency.

Asafoetida

Garlic powderUse double the weight. Stir into hot oil just before adding wet ingredients; mimics the allium savoury background without the sulphurous edge.
Garlic pasteUse 2 g for every 0.5 g of asafoetida. Sauté in oil until the raw smell clears; adds moisture and sweet allium depth.

Ground garlic

Garlic powderUse equal weight (1:1). Behaves virtually identically, dissolving seamlessly into dry rubs or wet gravies.
Garlic pasteUse 300% to 400% of the weight (e.g. 3–4 g paste for 1 g ground). Sauté in oil to cook off the raw moisture; imparts a fresher, sharper punch.
GarlicFinely mince or grate fresh cloves; use 300% to 400% of the weight. Fry gently in oil early in the cooking process to mellow the pungency.

Curry leaf

Bay leafFry 1 bay leaf for every 5 curry leaves in hot oil; imparts a warm, woodsy background note, but misses the citrus-sulphury punch entirely.
Lime juiceAdd a small squeeze (about 5 ml per sprig of curry leaves) right before serving; provides sharp citrus top notes without the toasty, herbal aroma.
Similar dishes

- Same: Both are brothy South Indian soups prepared with tomatoes, onions, vegetable oil, curry leaves, and a whole-spice tempering of mustard, cumin, and dried red chillies.
- Different: Pappu Charu uses a large quantity of tamarind extract alongside fresh green chillies and coriander seeds, while using less oil and tomato and omitting the garlic, asafoetida, urad dal, and sugar used in this dish.

- Same: Both soups are tempered in vegetable oil with mustard seeds, cumin, dried red chillies, garlic, asafoetida, and curry leaves alongside tomatoes and turmeric.
- Different: The Rasam incorporates toor dal, tamarind extract, black peppercorns, and coriander seeds, while omitting the onions, sugar, chilli powder, urad dal, and fresh coriander leaves used in this dish.

- Same: Both recipes use vegetable oil and share a tempering of mustard seeds, cumin, urad dal, dried red chillies, curry leaves, and asafoetida, along with onions and fresh coriander.
- Different: Nariyal Tamatar ki Chutney adds 200 grams of coconut and triple the chilli powder while omitting garlic and fresh tomatoes to create a thick condiment rather than a simmered soup.

- Same: Vendaya Rasam is also a South Indian rasam tempered with mustard seeds, dried red chillies, asafoetida, and curry leaves, and flavored with tomatoes and fresh coriander.
- Different: Instead of using onions, garlic, cumin, and a heavy tomato base cooked in vegetable oil, Vendaya Rasam uses tamarind extract, ghee, rasam podi, and a paste of roasted fenugreek seeds and toor dal.































