I layer my potatoes in a dish then add a walnut crumble top to them. I love it- it's not overly sweet.
Place a single layer of sweet potatoes (cooked or canned) in a greased casserole
Melt 2 tablespoons butter, remove from heat & add
1/2 cup brown sugar
1 cup chopped walnuts
stir together & spoon over potatoes
bake 350 for 1/2 hour to 45 minutes