Preheat oven to 425°F. You’ll need 8 cups sliced apples, which translates to about 3 1/2 to 4 pounds purchased weight. ¾ cup brown sugar 3 tablespoons flour 1 teaspoon cinnamon ¼ teaspoon salt ½ teaspoon nutmeg 2 tablespoons lemon juice      Mix together, then toss in the apples. Spray a 9 inche pie pan, one that’s about 1 1/2 inches deep, with non-stick pan spray. It makes it easier to get slices out intact, and helps counteract any potential filling leaks. Place crust in pan & crimp edges. Spoon the apple filling into the crust. Make streusel topping. Mix the following until crumbly:    1/2 cup sugar    1/2 cup flour    1/2 cup cold butter, cut into pats Spread the streusel on top of filling. Put the pie in a large brown paper grocery bag. Fold the opening closed, and secure it with staples or paper clips. You may substitute parchment paper by stapling two pieces together to fashion a bag. I have also folded foil over the pie & that also works fine. The idea is to steam the pie, thereby holding in the moisture & flavor. Put the pie in its bag (paper, foil or parchment) on a baking sheet. Bake the pie in preheated 425°F oven for 1 hour.                                Remove the baking sheet and pie from the oven, and carefully slit the bag open, watching out for steam. Let the pie cool for an hour or so before cutting.