Bring the butter out to room temp an hour before cooking.
Turn the oven on and set it to 175° C / 350° F.
Peel and roughly cube (1.5-2") the sweet potatoes and boil in water in a pan until soft. This usually takes 15 minutes. Get rid of the water and rinse with cold water.
Pie crust
Mix the pie crust ingredients in a bowl or food processor and work lightly until ingredients are well blended.
Fill the pie plate with an evenly thick layer of the pie crust.
Pre-bake the crust in the oven for 10 minutes.
Filling
Mix the ingredients for the filling in a bowl and blend or whisk until smooth.
Fill the pie crust with the filling and bake in the oven for 40 minutes.
Serving suggestion
Serve the pie with some whipped cream with some sugar in it.