Catherine's Sweet Potato Cranberry Streusel

This is so good! It's a great side dish; my family loves it!

One 49 ounce can of sweet potatoes, drained (I use fresh and mash them)
one bag of fresh cranberries, washed and drained and sort out the bad ones
one stick butter, melted
3/4 cup packed brown sugar
3/4 cup oatmeal
3/4 cup flour
1 1/2 tsp cinnamon

Combine brown sugar, oatmeal, flour, and cinnamon in a bowl. In a 2.5 quart casserole dish, combine sweet potatoes and cranberries with half of the sugar mixture. Combine the rest of the sugar mixture with the melted butter and put it on top of the sweet potato mixture. Bake at 350 degrees for 30 minutes or until bubbly. You can also make this in a crockpot, as I found out yesterday, but mix it all up rather than putting some of the streusel on top because it won't get crispy anyway.