Preheat oven to 425 degrees. While oven is preheating, cook bacon in a non-stick skillet (or oven), until crispy and cooked through. Remove bacon from pan to paper towels (to drain) and then crumble; do NOT drain grease from skillet.
Prepare the unbaked deep dish pie shell by piercing the dough on the bottom and sides with the tines of a fork - (this helps prevent air pockets puffing up while baking). Add the crumbled bacon to the unbaked, prepared pie crust, then add the cooked veggies. Top with the grated mozzarella and Swiss cheese.
Carefully put quiche into a preheated 425 degree oven. Don't spill it! Bake at 425 degrees for 15 minutes, then reduce heat to 300 degrees and bake for an additional 35-40 minutes (quiche is done when a knife comes out clean). Remove quiche pan to a wire rack. Let it cool down a bit, slice, serve... and enjoy!
Bacon Broccoli Quiche https://www.thegratefulgirlcooks.com/bacon-broccoli-quiche/