P
Indian
Aloo Posto — Potato in Poppy Seed Paste (আলু পোস্তো)
Aloo posto (আলু পোস্তো) is the quintessential Bengali vegetarian dish: potato pieces cooked in a paste made from posto (পোস্তো — white poppy seeds, Papaver somniferum) that coats each piece in a thick, slightly nutty, mildly sweet crust. Posto (poppy seed) is to Bengali cuisine what sesame is to Korean or tahini to Levantine — the paste-forming nut-seed that creates body and a distinct earthy flavour. The paste is made by soaking white poppy seeds in water for 30 minutes before grinding wet — dry grinding produces a gritty, dusty result rather than the smooth white paste needed for even coating. A touch of mustard oil and green chilli completes the dish.
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I
The Market List
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800 g
8 tbsp
white poppy seeds (সাদা পোস্তো)
soaked in cold water for a minimum of 30 minutes, then drained
Origin · TurkeyNot yet stocked in British Columbia
4
green chillies
left whole or broken once
Not yet stocked in British Columbia
2 tbsp
mustard oil
Not yet stocked in British Columbia
1 tsp
fine salt
or to taste
Your own market
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II
The Method
1
Place the white poppy seeds in a bowl, cover generously with cold water, and leave to soak for a minimum of 30 minutes, so the seeds soften from the inside out and will grind to a smooth, dense paste rather than a gritty one. Drain, then grind with a small splash of water until no grit can be felt when the paste is pressed between the fingers. For the quick weekday method, skip grinding: the soaked, drained seeds may go directly into the pan at Step 3, where the steam from a covered pan will work them into a paste against the potato.
2
Heat the mustard oil in a heavy pan over medium heat until it loses its raw sharpness and shimmers, because raw mustard oil carries a harsh, acrid bite that would dominate the delicate posto. Add the potato pieces and salt, stir to coat in the oil, and cook uncovered over medium heat, stirring occasionally, until the surfaces are just beginning to colour and a skewer meets resistance at the centre — the potato must be approximately half-cooked before the paste goes in.
3
Reduce the heat to low, add the posto paste — or the soaked, drained whole seeds for the weekday method — and the green chillies, then stir once to distribute the paste among the potato pieces. Cover the pan immediately, so the paste steams gently onto the potato rather than seizing and scorching on the hot pan surface. This is where the dish lives or dies: high heat or an uncovered pan at this stage will burn the posto before the potato is cooked through, leaving a bitter, darkened crust instead of the clean, milky coating that defines the dish.
4
Cook covered on the lowest heat for 10–12 minutes, then lift the lid and press a piece of potato — it should yield completely, and each piece should wear a thick, matte white-cream crust with no liquid remaining in the pan. If any moisture persists, replace the lid and continue for a further 2–3 minutes, giving the steam time to be absorbed back into the paste rather than leaving the posto wet and loose.
III
Quality Hierarchy
01
Reserve — White poppy seeds sourced from West Bengal, ground to order from seeds soaked the same day; mustard oil cold-pressed from black mustard seed and used unrefined; potatoes of a floury-waxy variety that holds its shape but absorbs the paste.
02
Estate — Good-quality white poppy seeds (সাদা পোস্তো) from a specialist South Asian grocer, soaked the full 30 minutes and ground wet to a smooth paste; unrefined mustard oil.
03
Market — White poppy seeds from a reliable supermarket spice aisle, soaked and ground; standard mustard oil. The dish remains faithful to type.
04
House — White poppy seeds used without pre-soaking, or blue/black poppy seeds substituted — the paste will be granular rather than smooth, and the flavour profile differs materially from the Bengali original.
IV
Sensory Tests
◇Touch. After grinding, the paste shows no grit when a small amount is pressed between thumb and forefinger — it is uniformly smooth and dense.
◇Touch. At the halfway point of pan cooking, a skewer or knife tip meets firm resistance at the centre of the potato — the piece is half-cooked, not raw, not tender.
◇Smell. After the lid goes on with the paste, no sharp or acrid scorch note reaches the nose — only a faint, warm, nutty fragrance indicates the paste is steaming correctly on low heat.
◇Sight. At the finish, each potato piece carries a thick, matte, white-cream crust of posto with no wet liquid remaining on the pan floor.
◇Where it lives or dies. The posto paste must be added only after the potato is half-cooked, then cooked covered on the lowest heat — added raw at the start or cooked uncovered on high heat, the paste burns on the pan before the potato is done.
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VI
What to Pour
The pairing
2023 seven stars VEGA
Township 7 Vineyards & Winery · Naramata Bench
Township 7 Vineyards & Winery · Penticton →Sparkling wine
From British Columbia
10 Year Old Estate Whisky
Shelter Point Distillery · Vancouver Island
Shelter Point Distillery · Campbell River →Whisky
Without alcohol
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The whole pairingPillar VII
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