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Place the bread cubes into a lightly sprayed or oiled 9x13" baking dish.
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In a medium nonstick skillet over medium heat, melt the butter. Add the mushrooms, red pepper, green onions and celery. Saute until tender, 6-7 minutes. Spoon the mixture evenly over the bread. Layer the crab and Swiss cheese over the mixture.
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In a medium bowl, whisk together eggs, half & half, wine and seasonings. Use a whisk and fold in the sour cream. Pour this over the bread mixture. Cover with plastic wrap and refrigerate over night.
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Preheat the oven to 350 degrees. While the oven is heating, bring the strata out and let it come to room temperature. Bake, covered with foil, until set, about 35 minutes. Remove the foil and sprinkle with the grated Parmesan cheese. Bake, uncovered, until bubbly, about 10 more minutes. Let it stand for ten minutes before serving.