Moo's Asparagus Custard Casserole

This is a little something Moo threw together. It's a great side dish that's a great way to enjoy asparagus.

5 eggs
2 cups milk
2 T butter
2 T onion, chopped
2 T flour
1 can mushroom soup (concentrated)
1 cup cheese, shredded (Moo usually used either Jack or mozzarella)
I large bunch of asparagus cut into bite-size pieces
Bread crumbs
Slivered almonds

Beat eggs and milk. Saute chopped onion in butter. Combine these ingredients, then add flour. Turn oven to 350 degrees and preheat. Put cut asparagus in souffle dish. Pour egg mixture over asparagus. Sprinkle with bread crumbs and slivered almonds. Bake at 350 for about 50 minutes or until the custard is set. Serve warm