Warm up the oven. turn the oven on to 350 degrees.

Combine the ingredients for the dish. Sweet potatoes should be drained before adding milk, eggs, sugar, butter, pumpkin pie spice, vanilla, and salt to a large bowl. Pour into a 9-by-9-inch oven-safe dish or pan and reserve.

Mix the topping ingredients together. Mix the butter, pecans, and sugar in a small bowl until well combined. Add the pecan mixture on top of the casserole.

until firm, bake for 45 minutes. Observe for ten minutes. Serve warm.