Preheat the oven to 425 F.
For the pie crust, you do truly just dump it all and mix it up with a fork. Then use your fingers to press the dough out flat around your pie pan or quiche dish. Take your fork and poke some holes in various places so the crust will stay flat while you bake it. Bake 10 minutes or so, until partially done.
Cook the bacon if you need to, then lay on paper towels to drain. Crumble it in your hands or chop it up. I had bacon leftover from the other night when I made baked potato soup, so I just crumbled that up.
If you cook the bacon now, leave some of the bacon grease in the pan and cook the onion and garlic in that rather than oil. If you're using bacon that's already cooked, add the 2 tsp oil to a skillet and cook the onion and garlic about 5 minutes over medium heat, until softened. Stir the bacon pieces into the pan. Stir the chopped spinach into the pan.
Spread the bacon, spinach, onion and garlic mixture over the pre-baked pie shell. Sprinkle the cheeses on top of the filling.
In a small bowl whisk the eggs and cream together. I usually use half-and-half because I keep that around for my coffee but I have made quiches with milk before and they're good, but less rich.
Bake at 425 for 30-40 minutes, until set. Let cool slightly before serving, or let it cool all the way to room temperature.