I make mashed sweet potato in the oven. It gives it a delicious flavor. Clean & rinse off sweet potatoes, Dry well. With a fork, prick potato 3-4 times. Place on a parchment or tin foil linked baking sheet. Cook in oven at 450 degrees for 40-45 minutes until potatoes are soft to the touch using a kitchen towel o squeeze. Let cool before peeling and mashing sweet potatoes.
In a small bowl mix together salt, ground cloves, ground ginger, and ground cinnamon. Set aside.
In a large bowl using an electric hand mixer beat eggs. Add in 2 cups cooked sweet potatoes and blend well. Add in evaporated and sweetened condensed milk, blend again. Add in blended spices and mix until well incorporated.
Place pie shell into pie dish and pour mixture in.
Bake at 425 degrees for 15 minutes. Reduce heat to 350 and bake an additional 30-40 minutes until pie mixture is set in the center. Use a toothpick in the center to test for doneness. (Check pie crust midpoint if golden brown. If so, place a pie ring or tin foil over the crust to keep from browning to much during last half of cooking.
Let pie cool on a cooking rack for at least 2 hours to help pie set up. Serve or refrigerate.