"You get the best of both worlds with this baked blueberry French toast casserole: sweet custard middles with a crispy topping! Assemble and bake right away, or make it ahead and look forward to a brunch feast...."
INGREDIENTS
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1 pound loaf rustic bread, cut into 1-inch cubes (about 10 cups of cubes)
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1 1/2 (or 2) cups blueberries, frozen or fresh
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5 large eggs
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2 cups milk (whole or 2%)
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1 cup heavy cream
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1/2 teaspoon vanilla extract
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8 tablespoons sugar, divided
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1 tablespoon lemon zest
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1/8 teaspoon kosher salt
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2 tablespoons unsalted butter, diced