mix all together

Topping:

1 cup oatmeal

1/2 cup all purpose flour

1/2 cup brown sugar

1 cup chopped walnuts

1 tsp sea salt

4 oz (1 stick), unsalted butter, chilled, cut in small pieces

Dough:

1 1/2 cups all purpose flour

4 oz (1 stick) unsalted butter, chilled, cut in small pieces

4 tbs cold water

Bake: 400 degrees