For apple mixture:
5 lbs Honeycrisp apples - peeled, cored & sliced
5 lbs Macintosh apples - peeled, cored & sliced
Grated zest of 2 lemons
Grated zest of 2 oranges
3 Tbsp fresh squeezed lemon juice
3 Tbsp fresh squeezed orange juice
3/4 cup granulated sugar
6 tsp ground cinnamon
3 tsp ground nutmeg
3/4 cup brown sugar, packed
Combine above ingredients & pour into pie tins or 8 x 8 aluminum pans. (I soaked the apple slices in a bowl of room temperature water with some vitamin C tablets in it to keep them from browning while I prepared the rest of the ingredients).
3 cups granulated sugar
3 cups light brown sugar, packed
6 cups all purpose flour
4 cups old fashioned oats
2 tsp kosher salt
3 cups butter, melted
Mix together dry ingredients, then pour melted butter over the top & stir until crumbly. Divide topping mixture evenly over each pan of apples. Cover with foil & freeze.
Thaw & bake uncovered at 375 degrees until apples are tender, about 45 minutes. You can probably bake these from frozen by increasing the baking time by 15-20 minutes, but I have not tested that method. If the topping starts to brown before the apples are tender, cover with foil.
Recipe adapted from versions I found here: