Toss apples with 1 tablespoon lemon juice in a medium-sized bowl.
Combine sugar, flour, cinnamon and salt in a small bowl. Pour over apples and toss. Stir in applesauce. Spoon this mixture into pie pan and dot with butter.
Cut remaining crust into strips; using every other one arrange over top of pie. Lattice in remaining strips (going the other direction, crossing over and under every other strip).
For crunch topping, combine flour, sugar and salt in a bowl. Cut in butter with a fork until mixture is crumbly. Sprinkle over the top of crust.
Bake for 10 minutes, then reduce heat to 350°F and continue to bake for about 45 minutes, or until crust and topping are golden brown. (My pie with golden delicious apples was done after 30 minutes at this step, so watch your pie!).
Note: It helps to make a foil ring to put around pie crust edge to keep it from browning too fast.