Heat oven to 350°F.
In large bowl, stir butter, brown sugar, salt and eggs with whisk until combined. Add sweet potatoes, half-and-half, lemon juice and nutmeg; mix until well combined.
Place pie crust in 9-inch pie pan as directed on box for One-Crust Filled Pie. Pour sweet potato mixture into crust.
Bake 55 to 60 minutes or until knife inserted in center comes out clean. Remove from oven to cooling rack. Cool completely, about 1 hour.
Before serving, in small bowl, mix pecans and maple syrup until pecans are coated. Pour mixture on top of cooled pie. Store in refrigerator.