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1
Rinse mushrooms and pat dry with paper towels; chop mushrooms(I usually make mine about the size of diced ham chunks).
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2
Melt four tablespoons butter in large skillet.
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3
Add mushrooms,onions,celery and bell pepper,saute until just tender.
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4
Remove from heat.
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5
Stir in Mayonnaise;mix well.
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6
Use remaining two tablespoons butter to spread on both sides of bread slices;cut bread into cubes(I usually stack the bread and cut it all once to save time).
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7
Spread about half of the bread cubes in a lightly greased 13x9 baking dish.
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8
Spoon mushroom mixture evenly over bread.
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9
Cover with remaining bread cubes.
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10
In a medium bowl, combine eggs and milk;mix well.
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11
Pour over mixture in baking dish.
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12
Cover and refrigerate overnight.
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13
Before baking,pour mushroom soup over mixture in baking dish.
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14
Sprinkle cheese on top.
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15
Bake in a preheated 350 degree oven for one hour, or until hot and bubbly.