Tahchin-e Sabzijat (ته چین سبزیجات) — Persian-Style Layered Vegetable Bake with Toasted Corn Crust

• 30 mlGrapeseed oil (or extra-virgin olive oil)
• 200 gYellow onion (finely diced)
• 12 gGarlic (minced (about 3 cloves))
• 140 gCorn flour (fine corn flour (not cornstarch))
• 360 mlWater (room temperature)
• 6 gFine sea salt
• 2 gGround turmeric
• 1 gGround black pepper
• 300 gZucchini (cut into 8 mm half-moons)
• 300 gEggplant (peeled in stripes, cut into 12 mm cubes)
• 180 gRed bell pepper (cut into 1.5 cm pieces)
• 500 gFresh tomatoes (grated on the large holes of a box grater (skins discarded))
• 200 gTomato sauce (plain tomato sauce (passata-style))
• 80 gGreen onions (thinly sliced (white and green parts))
• 40 gCilantro (finely chopped)
• 15 mlVinegar (white wine vinegar or apple cider vinegar)
• 180 gSour cream (full-fat for the velvety finish)
• 2 gLemon zest (finely grated)

Instructions

1. 1

   Heat the oven to 220°C / 425°F (convection 200°C). Line a baking sheet. Toss zucchini, eggplant, and bell pepper with 20 ml oil, 4 g salt, and 1 g pepper. Roast 18–22 minutes, stirring once, until browned at the edges and tender. Reduce oven to 190°C / 375°F.

2. 2

   Make the toasted corn crust base: warm 30 ml oil in a saucepan over medium heat. Add diced onion and cook 8–10 minutes until soft and lightly golden. Add 12 g minced garlic and cook 45–60 seconds until fragrant. Stir in turmeric and pepper, then add corn flour and toast 2–3 minutes, stirring constantly.

3. 3

   Whisk in 360 ml water gradually to prevent lumps, then add 6 g salt. Cook over medium-low heat 4–6 minutes, stirring, until thick like a soft polenta and pulling from the pan. Remove from heat and rest 3 minutes to set slightly; it should be spreadable but not runny.

4. 4

   Grease a 23×23 cm (9×9 in) baking dish with 15 ml oil. Spread the warm corn mixture evenly into the dish, pressing it into the corners with a spatula. Layer the roasted vegetables over the top in an even layer. Bake at 190°C / 375°F for 18–20 minutes to firm the crust and meld flavors.

5. 5

   While it bakes, cook the tomato-herb reduction: heat 15 ml oil in a skillet over medium heat. Add 80 g green onions and cook 2 minutes. Add 8 g grated garlic and cook 30 seconds. Stir in grated tomatoes, tomato sauce, 5 g salt, and 1 g pepper; simmer 10 minutes, stirring often.

6. 6

   Add vinegar and 60 ml water, then simmer 6–8 minutes until glossy and spoonable (not watery). Turn off heat and stir in chopped cilantro so it stays bright. Let the bake cool 10 minutes, spoon the warm tomato-herb reduction over the top, then finish with sour cream and lemon zest just before serving.