Roast 4 to 5 sweet potatoes in oven until done. Make sure to cover in foil to prevent from dripping. Cool completely so they will peel easily. Beat with remaining ingredients until smooth. Place in a 3 quart casserole. Mix topping ingredients with a fork to crumb consistency and sprinkle on potatoes. Bake uncovered at 350 degrees for 30 minutes.
Can be prepared ahead and frozen. Thaw before cooking.
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