Haute Baked Zucchini Gratin

Method

1. 1

   Mise en place (set yourself up to move fast)

2. 2

   Preheat the oven to 220°C / 425°F. Place a rack in the upper-middle position. Line a large sheet pan with parchment. Set out: a clean towel, a colander, a small sauté pan, a microplane (or fine grater), and a mixing bowl.

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   Critical point: Zucchini carries a lot of water—if you don’t manage it, you’ll steam instead of roast. We’ll salt briefly, then roast hot to concentrate flavor.

4. 4

   Cut the zucchini for elegant texture

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   Trim ends. Slice zucchini lengthwise into long planks, 6–8 mm (about 1/4 in) thick. (A mandoline is great—use a guard.) Keep slices uniform so they cook at the same pace

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   Lay the slices in a single layer on your towel or a tray.

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   Quick salt cure (draw out water without turning mushy)

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   Sprinkle zucchini evenly with 6 g / 0.21 oz of the salt. Let sit 12 minutes. You’ll see beads of moisture.

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   Blot thoroughly with the towel. Do not rinse—blotting keeps flavor while reducing surface water.

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    Critical point: Don’t over-cure. Much longer than ~15 minutes can soften the slices too much for clean plating

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    Build the lemon-thyme crumb (your “chef’s seasoning layer”)

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    In a small pan, toast pine nuts over medium heat 2–3 minutes, shaking often, until fragrant and pale golden. Remove to cool.

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    In the same pan, melt butter with olive oil. Add garlic and warm 30–45 seconds—fragrant, not browned

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    In a bowl combine panko, 30 g / 1.1 oz Parmesan, thyme, lemon zest, pepper, parsley, toasted pine nuts, and remaining 4 g / 0.14 oz salt. Pour in the warm butter-oil mixture and mix until the crumbs look evenly “sanded” and lightly glossy

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    Roast: high heat, open surface (color = flavor)

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    Arrange zucchini on the lined pan, slightly overlapped like roof tiles (one even layer). Brush or drizzle with any remaining seasoned fat from the crumb bowl.

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    Roast 12 minutes. Pull the pan, sprinkle the crumb mixture in a light, even blanket (don’t pile it). Return to oven 6–8 minutes until zucchini is tender and crumbs are deeply golden

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    Parmesan lace tuile (simple, high-impact restaurant finish)

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    While zucchini roasts, make a quick tuile: on a separate parchment-lined pan, place 4 small mounds of the remaining 20 g / 0.7 oz Parmesan (about 5 g / 0.18 oz each) and flatten into thin circles.

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    Bake 3–5 minutes at 220°C / 425°F until bubbling and amber at the edges. Cool 1 minute, then lift carefully—crisp as it cools.

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    Final flash + seasoning check

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    If you want extra color, switch to broil/grill for 30–60 seconds at the end—watch closely. Taste a corner: adjust with a pinch of flaky salt and a few drops of lemon juice for brightness

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    Plate like a bistro tasting menu (clean, deliberate)

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    Optional but beautiful: smear 15 g / 0.5 oz crème fraîche per plate in a thin swoosh

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    Stack zucchini “petals” in a loose fan. Spoon any toasted crumbs from the pan over the top. Finish with microgreens (or dill fronds), a final whisper of lemon zest, and a Parmesan tuile standing upright for height.

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    Type of dish

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    Elegant vegetable side or refined starter

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    Garnish / serving suggestions

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    Garnish: microgreens, dill fronds, flaky salt, extra lemon zest, a few pine nuts reserved for the top.

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    Serve with: roasted fish, chicken jus, or as a standalone starter with crusty bread

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    Drink pairing: dry Riesling, Grüner Veltliner, or a crisp Polish apple cider.

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    Notes, time, difficulty, kcal (per serving)

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    Active time: ~20 minutes

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    Total time: ~35 minutes

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    Difficulty: Medium (precise slicing + timing)

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    Critical points: blot after salting; roast hot; add crumb midway to keep it crisp

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    Calories: ~300 kcal per serving (approx.; depends on whether you use crème fraîche and how much crumb you apply).