I am thinking of making a hamburger, pasta casserole in the oven tonight. I will add some milk, cream of mushroom soup and French fried?

onions. Do I have to cook the hamburger meat and pasta before putting into the casserole? Or if I cook the dish in the oven for about 45 minutes or longer, can I put the hamburger meat and pasta in raw?

WHY or WHY NOT?
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