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1
Make the Starter In a large bowl, mix the flour with the water and yeast.
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2
Cover the bowl and let stand at room temperature overnight.
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3
Make the Dough Grease a large bowl with olive oil.
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4
In the bowl of a standing mixer fitted with the dough hook, combine the starter with the flour, water and yeast and mix at medium speed for 8 minutes.
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5
Let rest for 20 minutes, then add the salt and mix at medium speed until smooth and tacky, about 8 minutes.
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6
Scrape the dough into the greased bowl and shape it into a ball.
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7
Cover and let stand in a warm place until doubled in bulk, about 1 hour.
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8
Make the Dough Transfer the dough to a lightly floured work surface and cut it in half.
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9
Shape the dough into 2 balls and transfer to a parchment-lined baking sheet.
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10
Brush the balls with olive oil, cover with plastic wrap and let stand until doubled in bulk, about 1 hour.
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11
Meanwhile, Prepare the Topping Preheat the oven to 400.
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12
In a large bowl, toss the squash with the 2 tablespoons of olive oil and season with salt and pepper.
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13
Spread the slices in a single layer on 2 large rimmed baking sheets and roast for about 15 minutes, until tender; let cool completely.
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14
Increase the oven temperature to 450.
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15
Meanwhile, Prepare the Topping Gently curl the cooled squash slices and press them into the dough.
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16
Brush the focaccia with olive oil and bake for 25 to 30 minutes, until risen and browned on top.
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17
Transfer to a rack and let cool for 5 minutes.
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18
Drizzle honey on top and sprinkle with thyme leaves and Maldon salt.
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19
Serve warm.