In a large bowl mix flour & salt and cut in shortening and butter until it the mixture forms coarse crumbs.
Sprinkle 4 tbsp of ice water in and mix lightly with a fork until dough is moist enough to hold together.
Shape into large ball, wrap with saran wrap, and refrigerate for 30 minutes.
Roll dough out into a 14-inch round and ease in tart pan.
Cut off over hang if you desire or keep.
Place in refrigerator.
Preheat oven to 450 degrees F.
Grease a jelly roll pan and place tomatoes on it.
Sprinkle with salt & pepper and bake for 30-minutes.
Remove and let cool and turn oven down to 375 degrees F.
In a large bowl whisk together eggs, milk, cheese, and ½ tsp of salt.
Stir in basil, leaving 1 tbsp out for topping.
Pour egg mixture into tart shell and arrange tomatoes on top.
Sprinkle with remaining basil and bake for 45-minutes or until inserted knife comes out clean.
Let cool on wire rack.
Serve hot or at room temperature.