Spiced Roasted Oyster Mushrooms

The crisp, savory-sweet mushroom filling from Ottolenghi’s mushroom tacos, pulled out as a standalone component. Torn oyster mushrooms roasted hard until browned and chewy-crisp, glazed with soy and maple and a homemade cumin-chile-allspice blend.

Why It Works

• Torn, not sliced — ragged edges give more surface area for browning and crisp, lacy bits.
• Soy + maple is a classic umami/sweet pairing: the soy brings glutamates and salt, the maple caramelizes for color and a roasted edge. Together they push the mushrooms toward a meaty, almost-jerky character.
• High heat, two-stage roast — spreading across two sheets first prevents steaming (mushrooms hold a lot of water); consolidating onto one sheet for the final 8 minutes lets them brown and crisp once the moisture has cooked off.
• Bloom the spice in the dish, finish with the oil — most of the freshly-ground cumin/chile/allspice mix roasts into the mushrooms, while a spoonful held back in olive oil becomes a raw finishing drizzle, keeping the spice aromatic and bright on top.

Ingredients

• 1 lb 8 oz (680 g) oyster mushrooms, roughly torn
• 2 garlic cloves, crushed
• 3 tbsp soy sauce
• 4½ tsp maple syrup
• 7 tbsp (105 ml) olive oil — split: 5 tbsp (75 ml) for roasting, 2 tbsp reserved for the finishing oil
• Table salt
• 1 tsp cumin seeds
• 4 dried cascabel chiles (or ancho chiles), stems removed, roughly broken
• ½ tsp allspice berries

Instructions

1. Preheat the oven to 425°F / 200°C fan. Line two large rimmed baking sheets with parchment paper.
2. In a large bowl, mix the mushrooms with the garlic, soy sauce, maple syrup, 5 tbsp (75 ml) of the olive oil, and ¾ tsp salt.
3. Blitz the cumin seeds, chiles, and allspice berries to a powder in a spice grinder (or mortar and pestle). Put 1½ tsp of the spice mix into a small bowl with the remaining 2 tbsp olive oil and set aside — this is a finishing oil, don’t roast it. Stir the rest of the spice mix into the bowl of mushrooms.
4. Transfer the mushrooms to the prepared baking sheets, spread out as much as possible (crowding steams instead of roasts), and roast for 20 minutes.
5. Combine all the mushrooms onto one sheet, mix well, and continue to roast for another 8 minutes, until crisp and browned.
6. Drizzle with the reserved spiced finishing oil before serving.

Variations & Substitutions

• Mushrooms — oyster mushrooms are ideal for their texture, but king oyster (torn into strands), maitake, or a mix would all work. Avoid watery button mushrooms here.
• Chiles — cascabel give a nutty, mild-medium heat; ancho are the easy sub (sweet, raisiny, mild). Guajillo also works for a brighter, slightly sharper note.
• Maple syrup — load-bearing for the glaze/caramelization; honey or agave can sub but shift the flavor.
• Soy sauce — tamari to keep it gluten-free.

Notes from Testing

• (Source recipe — Ottolenghi mushroom tacos, p. 238. Component extracted; untested in this kitchen yet.)
• Reserved finishing oil is easy to forget — set it somewhere you’ll see it at plating.