Chinese Mystery Casserole

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This is from my mil's recipe box. it's a childhood fave of my hubby's. the mystery" is that all the liquid required cooks down to make a delicious casserole."

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Steps

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Preheat oven to 350 f degrees.

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Brown ground beef and onion in oil.

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Combine all ingredients in a huge bowl , and transfer to a 9x13 pan.

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Bake covered for 30 minutes.

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Bake uncovered for 30 minutes.

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Sprinkle the chow mein noodles on top of casserole , and bake for 15 minutes more.

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Ingredients

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oil, hamburger, onion, celery, cream of chicken soup, cream of mushroom soup, water, rice, soy sauce, black pepper, chop suey vegetables, chow mein noodles