
This Bengali classic is pure comfort food — tender Yukon Gold potatoes coated in a thick, fragrant paste made from soaked white poppy seeds and green chilies, finished with a drizzle of raw mustard oil that gives the whole dish a distinctive, pungent warmth. The poppy seed paste is the soul of the recipe, ground into a dense, opaque coating that clings to every cube of potato as it slowly steams and thickens in the pan. Nigella seeds and a dried red chili bloom in hot mustard oil at the start, building a smoky, aromatic base that makes the kitchen smell incredible before you've even added the potatoes. Every single ingredient here is naturally plant-based and free from tree nuts, so there's no need to scrutinize labels or worry about hidden almond flour or almond oil sneaking into the dish. The technique is straightforward — a light sear on the potatoes, then a covered braise with the posto paste until everything is meltingly tender and the sauce has reduced to a thick, clinging coat. It's the kind of dish that tastes deeply complex but relies entirely on a short list of pantry staples. Serve it with a slit green chili on top for a little extra heat and a very satisfying weeknight dinner.
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Place the white poppy seeds in a small bowl, cover with cold water, and soak for 30 minutes. Drain well.
Transfer the drained poppy seeds to a spice grinder or blender along with the 2 roughly chopped green chilies, 1/4 tsp salt, and 3 tbsp water. Grind to a smooth, thick paste, scraping down the sides as needed and adding water 1 tsp at a time only if the blades stall. The paste should be dense and opaque, not watery.
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