For the shortbread:
1 cup unsalted butter
1/2 cup + 2 tablespoons light brown sugar
1/2 teaspoon salt
2 cups all-purpose flour
For the pecan pie filling:
2 1/4 cups pecans
1/2 cup unsalted butter
1 cup light brown sugar
pinch of salt
1/3 cup light corn syrup
2 tablespoons heavy cream
1 teaspoon vanilla extract
1/2 cup dark chocolate
Sea salt, for garnish