In a medium bowl stir together 1/2 cup each packed brown sugar and all-purpose flour. Using a pastry blender, cut in 1/4 cup butter until mixture resembles coarse crumbs. Stir in 1/2 cup each chopped roasted peanuts or toasted almonds and flaked coconut. *Tip: To bake separate from the turkey, bake at 375°F 45 minutes.
Take It Easy:
Prep as directed, placing potatoes in a buttered 3-qt. baking dish. Spread sauce over potatoes. Top with Streusel. Bake in a 325°F oven, uncovered, about 1 hour or until browned and potatoes are tender. Let stand 10 minutes before serving.
Up to 1 day ahead, slice potatoes, make sauce, and prepare Streusel. Place in separate airtight containers and chill. (Place potatoes in a resealable plastic bag; squeeze out excess air.) Assemble and bake as directed.
To bake with turkey:
Place springform in 325°F oven with turkey. Bake for 1 hour. Cool and serve as above.