1) Preheat oven to 325 degrees.
2) CRUST: Combine flour, cheese, salt and garlic and mix well.
3) Add the egg and mix until the dough is well combined and stiff. Press pie crust into pie dish or tart pan. Bake CRUST for 12-15 min., or until it turns slightly brown.
4) FILLING: Meanwhile, combine spinach, artichokes, salt, garlic, Parmesan cheese, mascarpone and eggs. Pour mixture into prebaked tart shell. Sprinkle w/ extra Parmesan.
5) Bake at 350 degrees for 30 min.