Preheat oven to 350 degrees. Combine first four ingredients, stirring well, and set aside.
Melt 1 T of the butter in a large skillet; add apples and sugar. Cover and simmer 8-10 minutes or until tender. Drain off excess liquid. Stir apples into squash mixture. Spoon into lightly greased 2 quart casserole dish.
Combing remaining ingredients, stirring well. Sprinkle over squash mixture. Bake at 350F for 20 minutes.