Makes 4 dozen bars
Omit the nuts if you do not eat nuts on Rosh Hashannah. Otherwise, save this for Succot. These are delicious. You can also make them with pears and cranberries, just omit the apples and add pears and cranberries.
3 sticks unsalted margarine, softened
3/4 cup sugar
3 cups all-purpose flour
1/2 teaspoon kosher salt
6 tablespoons unsalted margarine
1/2 cup light brown sugar
12 Granny Smith apples (about 6 pounds)—peeled, cored and thinly sliced
1 tablespoon cinnamon
1/4 teaspoon freshly grated nutmeg
1 cup water, as necessary
3/4 cup pecans, almonds, walnuts or other chopped nut, optional
3 cups quick-cooking oats
2 cups all-purpose flour
1-1/2 cups light brown sugar
1-1/4 teaspoons cinnamon
1/2 teaspoon baking soda
1/2 teaspoon kosher salt
3 sticks unsalted margarine, cut into 1/2-inch cubes and chilled
MAKE THE CRUST Preheat the oven to 375°. Line a 15-by-17-inch rimmed baking sheet with parchment paper. In a standing electric mixer fitted with the paddle, beat the margarine with the sugar at medium speed until light and fluffy, 2 minutes. At low speed, beat in the flour and salt until a soft dough forms. Press the dough over the bottom of the sheet and 1/2 inch up the side. Bake in the center of the oven for 20 minutes, until the crust is golden. Let cool on a rack.
MAKE THE FILLING In each of 2 large skillets, melt 3 tablespoons of the margarine with 1/4 cup of the light brown sugar. Add the apples to the skillets and cook over high heat, stirring occasionally, until softened, about 10 minutes. Stir half of the cinnamon and nutmeg into each skillet. Cook until the apples are caramelized and very tender and the liquid is evaporated, about 10 minutes longer; scrape up any bits stuck to the bottom of the skillets and add up to 1/2 cup of water to each pan to prevent scorching. Let cool.
MAKE THE TOPPING Spread the nuts, if using, in a pie plate and toast until golden and fragrant, about 8 minutes. Let cool, then coarsely chop the nuts. In a large bowl, mix the oats with the flour, light brown sugar, cinnamon, baking soda and salt. Using a pastry blender or two knives, cut in the margarine until the mixture resembles coarse meal. Stir in the nuts and press the mixture into clumps.
Spread the apple filling over the crust. Scatter the crumbs on top, pressing them lightly into an even layer. Bake in the center of the oven for about 1 hour, until the topping is golden; rotate the pan halfway through baking. Let cool completely on a rack before cutting into 2-inch bars.