Gratin of Apples Onion and Gruyère

== Description ==
I obtained this recipe from an estate sale when I purchased the family collection from the Monsey Estate in Crandall, Texas in 1991.
* Contributed by Catsrecipes Y-Group
== Ingredients ==
* ¾ cup flour
* ½ teaspoon granulated sugar
* ¼ teaspoon salt
* 5 tablespoons butter
* 1 tablespoon cold water
* 1 egg yolk
* 2 tablespoons butter
* 1 medium yellow onion
* 1 Granny Smith apple cored and thinly sliced
* 8 slices wine sap apple thinly sliced
* 4 slices gruyère cheese thinly sliced
* 2 tablespoons finely chopped fresh chives
== Directions ==
# In bowl of food processor fitted with chopping blade combine flour, sugar and salt then cut in butter and process mixture until butter is finely distributed.
# Add water and egg yolk then process until dough forms a ball.
# Heat oven to 400°F.
# Divide dough into 4 pieces on lightly floured surface and roll out each piece to a 5-inch round.
# Fit each round into a 4-inch tart pan.
# Bake 15 minutes then reduce temperature to 350°F.
# Melt 1 tablespoon butter in skillet then add onions and sauté 10 minutes covered stirring occasionally then set aside.
# Melt remaining butter then add all apple slices and sauté until tender and golden.
# Fill each shell with sautéed onions and top with apple slices arranged in a fan pattern alternating two wine sap slices among the granny smith apples in each tart.
# Cover apple fans with cheese and bake 5 minutes.
# Garnish tarts with chopped chives.
Category:Cathy's Recipes
Category:Casserole Recipes
Category:Granny Smith apple Recipes
Category:Winesap Recipes
Category:Gruyère Recipes
Category:Egg yolk Recipes
Category:Yellow onion Recipes
Category:Wheat flour Recipes