Barbara Bush's Mushroom Quiche

1 unbaked 9-inch pie crust
3 tablespoons unsalted butter
1 1/4 pounds mushrooms, sliced
3 green onions, minced
1 garlic clove, minced
3 shallots, minced
1 3/4 teaspoons oregano
1 3/4 teaspoons basil
1 1/4 teaspoons salt
3/4 teaspoon marjoram
1/4 teaspoon black pepper
1/4 teaspoon thyme
1/2 teaspoon dry mustard
4 eggs
3/4 cup skim or whole milk, or half-and-half

Pre-bake the pie shell until golden brown and then glaze with an egg white and/or mustard before filling. Then put pie on top of cookie sheet or baking sheet on lower 1/3 part of oven. This will keep crust from getting soggy.

Position rack in lower 1/3 of oven and preheat to 375 degrees F.

Melt butter in large skillet over medium-high heat. Saut