Crockpot Sweet Potato Casserole

Bahan-bahan (6 porsi)

• 4 pounds sweet potatoes (peeled and cut into 1-inch cubes)
• ½ cup dark brown sugar
• ¼ cup unsalted butter (melted)
• 1 tablespoon vanilla extract
• 1 tablespoon water
• 1 teaspoon cinnamon (ground)
• 1 teaspoon pumpkin pie spice
• salt (to taste)
• 3 tablespoons brown sugar
• 2 tablespoons butter (melted)
• 2 tablespoons chopped toasted pecans