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1
Blanch the green beans: in a large pot, bring a lot of water to boil.
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2
Once the water is at a full boil, add 1 teaspoon salt, if desired.
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3
Add the green beans, and start timing immediately - do not wait for the water to return to a boil.
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4
Leave the green beans in the water for 5 minutes, keeping the heat on high.
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5
While the green beans are cooking, put a large amount of heavily iced water in a large pot or bowl.
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6
Drain the green beans, and put immediately in the iced water to stop the cooking.
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7
Preheat the oven to 350 degrees .
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8
Saute the onions and mushrooms in the butter for 10 minutes over medium heat.
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9
Add the flour, using a whisk to combine it with the butter, onions, & mushrooms.
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10
Add milk and whisk in, stirring over medium heat until the sauce begins to thicken.
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11
Add the cheese and whisk until it melts into the sauce.
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12
Add the Tabasco, soy sauce, pepper and salt.
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13
Drain the green beans.
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14
In a large mixing bowl, combine the green beans, water chestnuts, one can of the French's Fried Onions, and the sauce.
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15
Combine well.
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16
Place the green bean mixture in a large casserole dish.
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17
Bake at 350 degrees for one hour - top the casserole with the remaining can of fried onions after 45 minutes.
