Butternut squash casserole

This is so good, it's almost a dessert! You can also use sweet potatoes. To peel a squash is work, but it's worth it!

1 butternut squash
1 cup white sugar
1 1/2 cups milk
1 teaspoon vanilla
1 pinch salt
2 tablespoons flour
3 eggs
1/4 cup butter, melted

TOPPING
1/2 (16 ounce) package vanilla wafers, crushed
1/2 cup butter, melted
1 cup brown sugar

DIRECTIONS
Preheat oven to 425 degrees
Put butternut squash in the microwave and cook on high, until soft, 2 to 3 minutes. Cut in half, scoop out seeds and cube. Bring a large pot of water to a boil. Add squash and cook until tender, about 15 minutes. Drain and mash.
In a 9x13 inch casserole dish combine 3 cups mashed butternut squash, white sugar, milk, vanilla extract, salt, flour, eggs and 1/4 cup melted margarine.
Bake in preheated oven for 45 minutes, or until set.
In a medium bowl combine crushed vanilla wafers, 1/2 cup melted margarine and brown sugar. Crumble over top of cooked casserole and return to oven to brown.

Adapted from Allrecipes