INGREDIENTS
1 1/4 cups
unbleached white flour
1/4 tsp
salt
8 tbsp
frozen unsalted butter, cut into pieces
1/4 cup
plain Greek yogurt
1/4 cup
ice cold water
2 tsp
lemon juice
2
to 3 large apples, peeled and sliced into 1/4 inch slices (about 4 cups)
1/4 cup
packed dark brown sugar
1
heaping tablespoon all-purpose flour
1 tsp
cinnamon
1/4 tsp
nutmeg
1/4 cup
finely chopped raw walnuts (optional)
1
egg yolk
1 tsp
water
2 tbsp
butter
1/4 cup
maple syrup
1/3 cup
powdered sugar
1 tsp
vanilla
flaky sea salt, such as Maldon’s