In a medium bowl, beat egg yolks with a wire whisk. Add sugar, flour and salt. Gradually blend in half-and-half.
Pour mixture into pie crust. Bake for 30 minutes or until the center is firm.
Meanwhile, in a small saucepan, melt butter over low heat. Add brown sugar and maple syrup. Cook, stirring constantly, until mixture boils. Boil 1 minute, stirring constantly.
Remove from heat and stir in chopped nuts.
Spread maple topping evenly over hot pie. Cool completely before serving.
Interesting Facts
Maple syrup is made from the sap of sugar maple trees.
Maple syrup is a great source of manganese and zinc.
Maple syrup has a lower glycemic index than most other sweeteners.
This pie is a great source of calcium and protein.