3 tablespoons unsalted butter, thinly sliced and chilled
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½ cup panko bread crumbs
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⅓ cup freshly grated Parmesan cheese
Instructions
Preheat the oven to 425 degrees F (220 degrees C). Butter a 10-inch oval au-gratin baking dish.
Separate romanesco into large florets.
Bring a large pot of generously salted water to a boil. Add romanesco florets and boil until slightly softened, about 3 minutes. Drain well.
Arrange florets in the prepared baking dish. Season with salt, black pepper, and Italian seasoning; dot with thin slices of butter. Sprinkle with panko and Parmesan cheese.
Bake, uncovered, in the preheated oven until lightly browned on top, about 30 minutes. Serve hot.