Tian

[The Low and Slow Remix]

Tomatoes, zucchini, and eggplant layered thin with garlic, thyme, and olive oil, then roasted low until the edges caramelize and everything collapses into something greater than itself. Make it the morning before — it’s always better the second day, when the olive oil has soaked into everything.

Ingredients

3 medium zucchini (about 1 1/2 lbs / 680g), sliced 1/8 inch (3mm) thin
1 large eggplant (about 1 lb / 450g), sliced 1/8 inch (3mm) thin
4 medium ripe tomatoes (about 1 1/2 lbs / 680g), sliced 1/8 inch (3mm) thin
6 cloves garlic, thinly sliced
1 medium yellow onion, thinly sliced into rings
1/4 cup (60ml) extra virgin olive oil, plus more for drizzling
1 tbsp (3g) fresh thyme leaves (or 1 tsp / 2g dried)
1 tsp (2g) fresh rosemary, finely chopped
Flaky sea salt and freshly cracked black pepper
1/4 cup (25g) Parmigiano-Reggiano or aged pecorino, finely grated (optional, for finishing)

Steps

Prep:

Preheat oven to 325°F (165°C). A low oven is essential — this is not a dish you rush. Drizzle 2 tbsp (30ml) of olive oil into a large oven-safe baking dish or gratin dish (roughly 9×13 inch / 23x33cm). Scatter sliced onion and garlic across the bottom of the dish in an even layer. This base will melt into a sweet, savory foundation as everything roasts.

Layer:

Working in tight overlapping rows — like fallen dominoes — alternate slices of zucchini, eggplant, and tomato, standing them slightly upright and shingling each slice over the last. Pack them tightly; they will shrink considerably. Repeat until the entire dish is filled. Tuck any remaining garlic slices between the vegetable layers as you go.

Season:

Scatter fresh thyme and rosemary evenly over the layered vegetables. Season generously with flaky sea salt and freshly cracked black pepper. Drizzle the remaining olive oil over the entire surface — be generous. The olive oil is not an accent here; it is the cooking medium and the flavor base.

Roast:

Cover the dish tightly with foil and roast at 325°F (165°C) for 45 minutes. Remove foil, increase temperature to 375°F (190°C), and continue roasting uncovered for 40-50 minutes more until the vegetables are completely tender, the edges are caramelized and slightly crisped, and the liquid released has reduced into a concentrated, jammy sauce at the bottom of the dish. The top should look golden and collapsed, not wet.

Rest:

Remove from the oven and let cool to room temperature. If finishing with cheese, scatter Parmigiano-Reggiano or aged pecorino over the top while still warm. The tian is good now — and significantly better tomorrow. Cover and refrigerate overnight if time allows. Serve at room temperature or gently rewarmed at 300°F (150°C) for 15 minutes.

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Make it Good For The Gut

This dish is already anti-inflammatory by design. Eggplant contains nasunin, a potent antioxidant that protects cell membranes. Zucchini provides prebiotic fiber. Tomatoes deliver lycopene — which becomes significantly more bioavailable when cooked and combined with olive oil, exactly as prepared here. To deepen the gut benefit further, add 2-3 anchovy fillets to the onion base before layering — they melt completely into the dish, are invisible in the final result, and deliver omega-3 fatty acids and anti-inflammatory compounds. A small pour of raw apple cider vinegar added to the dish in the last 10 minutes of cooking provides digestive enzymes without competing with the olive oil’s flavor.

Remix Options

Yellow Squash Addition: Replace one zucchini with yellow squash for a more colorful, visually striking tian — the yellow, green, red, and purple create a pattern worth photographing before it hits the table. Potato Layer: Add one layer of very thinly sliced waxy potato (Yukon Gold) at the bottom beneath the vegetables. It absorbs all the olive oil and juices and becomes the most sought-after piece in the dish. Protein Base: Scatter 1 lb (450g) of sliced chicken thighs or Italian sausage (pasture-raised) across the onion base before layering vegetables over the top. The vegetables baste the protein as everything roasts together. Herbes de Provence Version: Replace the thyme and rosemary with 2 tsp (4g) herbes de Provence for a more intensely aromatic Provençal profile. Dairy-Free Finish: Skip the cheese entirely — the tian doesn’t need it. A final drizzle of your best olive oil and fresh herbs right before serving is the more French thing to do anyway. Summer Squash Only: For a lighter, quicker version, skip the eggplant entirely and use only zucchini, yellow squash, and tomato. Reduce roasting time by 20 minutes.

Good To Know

The Name: Tian refers to the Provençal earthenware dish the recipe is traditionally made in — and by extension, anything cooked in one. The technique of layering vegetables upright in a baking vessel is ancient, deeply regional, and endlessly adaptable. This is the foundational version. Slice Thickness: Uniformity matters more than thinness. If you have a mandoline, use it — 1/8 inch (3mm) is ideal, but consistent 1/4 inch (6mm) slices work fine. Inconsistent thickness means uneven cooking, with some pieces collapsing before others are done. Why Low and Slow: The long covered roast creates steam that gently collapses and tenderizes the vegetables without burning or drying them. The uncovered finish at higher heat is what concentrates the flavor and caramelizes the edges. Rushing either stage produces a different, lesser dish. The Day-After Effect: Overnight refrigeration allows the olive oil to reabsorb into the vegetables and the concentrated pan juices to redistribute throughout. The tian the next day is genuinely more flavorful — not just reheated leftovers, but a better version of the same dish. Plan for this. Storage: Keeps refrigerated, covered, for up to 4 days. The flavor deepens each day. Reheat gently at 300°F (150°C) or serve at room temperature. Freezes well for up to 2 months — thaw overnight in the refrigerator and reheat in the oven. Serving: Serve directly from the baking dish. A wide spatula works to portion without disturbing the layers too much. The bottom of the dish — soaked in concentrated tomato-olive oil — is the cook’s reward.