Preheat oven to 375 degrees
Boil a large deep pot of water
Add sweet potatoes and boil for 10-12 minutes
Remove from heat and drain sweet potatoes , then set aside
In a large deep skillet melt butter
Add brown sugar, white sugar , ginger, cinnamon, nutmeg, and pineapple juice
Stir well and allow it to simmer for 5 minutes while stirring
Remove from heat
In a deep baking dish , spray non stick spray and add sweet potatoes
Pour pineapple ginger mixture over sweet potatoes
Bake for 45 minutes , basting the potatoes every 10-15 minutes in the sauce
Remove from heat
Serve and enjoy !