Custard with vinegar

For the crust: 1/2 cup pecan halves 3/4 cup flour, all-purpose 3/4 cup pastry flour, whole wheat 1 tablespoon sugar 1/4 teaspoon salt 4 tablespoons butter,[...]

2 eggs 3 tablespoons butter , melted 3 tablespoons sugar 1/2 teaspoon salt 2 cups whole milk 1 1/2 tablespoons white vinegar 1 cup all-purpose flour 3/4 cup[...]